limestone for cement by wasit general trading llc. supplier from united arab emirates. product id 972260
Garmooz expertise in exporting high quality limestone rocks and able to resource huge quantity.
Product Name : Limestone ,
Grade : Cement Grade and Steel Grade ,
Size : 0 - 50 mm , 5 - 20 mm , 20 - 40 mm ,40 - 80 mm ,
Color : Pure White ,
Supply Capacity : 10,000 mt to 200,000 mt
Buy Limestone From Top Suppliers
* Shree Trading and Services is engaged in the supplying of natural stones and sands in both domestic and international markets. We have built an intrinsic reputation in the market by prioritizing customer satisfaction, valuable services, and most importantly, the supply of the best available stones suitable for various projects.
* Our professional-quality services help you in making the perfect choice from different types of limestones.
* Limestone is a sedimentary rock, which mostly contains the primary components of mineral calcite and aragonite, crystal forms of calcium carbonate, CaCO3. It is readily available, and relatively easy to cut into blocks and slabs for concrete and architecture.
* Limestone has different applications: frequently used as a commercial building material, which is an essential raw material in the concrete (Portland cement) industry. It is also used as the aggregate for the base of roads. It is used in various heavy industries for smelting, to remove impurities from the iron ore. Limestone also finds its applications in the decorative items for carvings.
Uses of Limestone
* Used as basic raw material in the cement industry
* Used as aggregate for the base of roads
* It is used for smelting and other metal refining process
* Used for making for floor tiles, wall tiles, facing stone, etc.
* Used in front decorative
* Limestone deposits are used in farming and agriculture lime or Aglime
* Limestone is supplied to mainly commercial building clients for building constructions, landscaping, and carvings. We also supply limestone to clients from cement and heavy industries. Hence, we ensure that the most suitable option and precise type of limestone are delivered according to the clientele requirements.
Transportation and Packaging
* We have the most efficient transportation facilities to handle all kinds of bulk orders of limestone. Our professional team ensures that the bags are properly packed to avoid any kinds of dust, stains, or damage during the transit and shipping. Limestone stone is mostly packed in bulks or as per the customer requirement.
We are supplier and exporter of Limestones Lumps.
Limestone Lumps are supplied by us at very reasonable rates. These Limestone Lumps are used extensively in numerous industries to serve varied purposes. Our Limestone Lumps have desired chemical & physical properties and are free from any external impurity. We ensure proper packaging of the Limestone Lumps with a view to provide best quality product to our clients. Use: Used for water purification and sugar refining. Features: Accurate composition Precise pH value Longer shelf life Demanded By: Cement industry Fertilizer industry Sugar industry Glass industry Chemical industry Iron & Steel industry.
Limestone has numerous uses: as a building material, an essential component of concrete (Portland cement), as aggregate for the base of roads, as white pigment or filler in products such as toothpaste or paints, as a chemical feedstock for the production of lime, as a soil conditioner, and as a popular decorative.
For price specification and other details please contact us.
Limestone is a common type of carbonate sedimentary rock. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate (CaCO. 3).
Limestone has numerous uses: as a building material, an essential component of concrete (Portland cement), as aggregate for the base of roads, as white pigment or filler in products such as toothpaste or paints, as a chemical feedstock for the production of lime, as a soil conditioner.
For price, payment term and other details please contact us.
Features Of Lime Stone Fines
Lime stone is a fine powder obtained from the processing of Limestone. It can be added to Portland cement as an addition, wither at factory to create a composite cement or at the batch plant to form a combination cement.
Limestone has numerous uses: as a building material, an essential component of concrete (Portland cement), as aggregate for the base of roads, as white pigment or filler in products such as toothpaste or paints, as a chemical feedstock for the production of lime, as a soil conditioner, and as a popular decorative
Origin :- Uae , Oman , Iran , Vietnam
Payment Terms :- LC/SBLC
Hydrated Lime is a dry powder mainly composed of calcium hydroxide Ca(OH)2. It is a colorless or white powder, which is obtained by hydrating Quicklime (Calcium Oxide) using specific equipment called hydrator in a process called hydration. The process converts CaO to Ca(OH)2.
Actually, hydration is a chemical process in which water molecules combine with Quicklime.
CaO + H2O ?? Ca(OH)2 + Heat
Hydrated Lime has other common names like Slaked Lime, Caustic Lime, Builder??s Lime, and Slack Lime.
Applications for Hydrated Lime:
top limestone suppliers (+website of companies)
In this article, you can find the list of top Limestone suppliers and importers by company name and country.Oman, UAE, India and Malaysia are the top suppliers of Limestone in the world. For each country we have listed top Limestone suppliers so you can contact them. List of 33 Limestone supply companies linked to their website. Known companies int the world like Srinath Enterprises (India), Global Mining CO. (Oman) and Rock Chemical Industries Group in Malaysia.
Limestone, which composed mainly of the calcium carbonate with the CaCo3 molecular formula plus impurities, is a sedimentary rock formed of the skeletal fragments of marine organisms such as mollusks and corals. Calcium carbonate is a generic name that covers abundant varieties of sedimentary rocks. In fact, in addition to limestone, it is the main ingredient of some other mineral stones like marble, gypsum, and travertine.
Limestone can be categorized as either high calcium or dolomitic. Typically, Limestone is classified as pure high-calcium limestone, high-quality or high-calcium limestone, and also dolomitic limestone that is commonly named Dolomite. Pure high-calcium limestone is 100 percent calcium carbonate, which is rarely found in nature, and high-quality or high-calcium limestone would contain 97 to 99 percent calcium carbonate and also 1 to 3 percent impurities. The natural limestone is nearly white, but according to its impurities, it has the color ranges from white, beige, cream, and the like.
According to international trade statistics provided by the UN, in 2018, the world supply of "Limestone" exceeded $834 million ( 77 countries). It was $540 million in the previous year (according to the merchandise trade statistics of 82 countries). Largest Limestone suppliers in 2018 were: Oman(27%), UAE (27%), India (7.3%) and Malaysia (6.3%).
We, Arij Global Trading, are specialized in supplying limestone with high quality and high calcium for our clients, which the specifications of our Industrial Grade and also Typical Grade is offered for your kind consideration.
our products portland-pozzolan cement, portland limestone cement and oilwell cement tcl guyana inc (tgi)
Cement and concrete are commonly thought to be the same thing, but they are very different. As part of a Group that manufactures both, it is important that we inform you of the difference. Indeed, cement is the key ingredient of concrete, the worlds most widely used building material. Annual global production of concrete hovers around 5 billion cubic yards (1.2 billion tonnes).
Before Portland Cement was discovered, natural cement was produced by burning a naturally occurring mixture of lime and clay. Since the ingredients of natural cement were mixed by nature, its properties varied as widely as the natural resources from which it was made.
The first cements were made by the Assyrians and Babylonians who used clay. The Egyptians later advanced to the discovery of lime and gypsum mortar as a binding agent for building such structures as the pyramids. The Romans finally developed a cement that produced structures of remarkable durability. The Roman Forum, the Colosseum and Roman Baths built about 2 B.C. are examples of early Roman architecture in which cement mortar was used. The secret of Roman success in making cement was traced to the mixing of slaked lime with pozzolana, a volcanic ash from Mount Vesuvius. This process produced a cement capable of hardening with the addition of water. During the Middle Ages, this art was lost and it was not until the scientific spirit of inquiry was revived that the secret of Hydraulic Cement cement that will harden on addition of water was rediscovered.
Between 1756 to 1830, many men experimented with the manufacture of cement. Most renowned are John Smeaton, a British engineer, who from his trials was able to rebuild the Eddystone Lighthouse in England; L.J. Vicat and Lessage in France; and Joseph Parker and James Frost in England.
In 1824, Joseph Aspdin, a bricklayer and mason in Leeds, England, took out a patent on a hydraulic cement that he called Portland Cement, as its colour resembled the stone quarried on the Isle of Portland off the British Coast. Aspdins method involved the careful proportioning of limestone and clay, pulverizing them, and burning the mixture (in his kitchen stove) into clinker, which was then ground into finished cement.
Portland Cement today is a predetermined and carefully proportioned chemical combination of calcium, silicon, iron and aluminium. Natural cement gave way to Portland Cement, (which is made by TCL Groups Business Units Arawak Cement Company Limited, Caribbean Cement Company Limited and Trinidad Cement Limited) which is a predictable, known product of consistently high quality.
Arawak Eco Plus is a Portland Limestone Cement (PLC). This generic type of cement is produced in accordance with ASTM C 595 standard for Type IL cement. Limestone is a key component of Arawak Eco Plus and has concrete strengthening properties to improve durability, workability of concrete & mortar, early compressive strength, comparable or better latter days strength to Portland cement, heat or hydration.
PLC has excellent concrete finishing properties, lower bleeding and slump loss, excellent response with SCMs and chemical admixtures. PLC clearly hydrates with synergies contributed by limestone that enables enhanced setting and strength performance.
Limestone has been used in cement manufacturing for over 25 years in Europe and is now being used in Canada and the Caribbean. PLC is not new to the construction industry as it has been used successfully in a variety of applications and exposure conditions.
The use of limestone in the manufacturing of Arawak Eco Plus significantly reduces carbon footprint and saves energy. It involves delivering sustainable building material which positively contributes to the welfare of society and to the environment.
Our Class G Cement meets and exceeds international Class G specifications and our product testing was carried out by independent laboratories. Our product is as good as that produced by any international competitor and undergoes internal laboratory testing (LAS-003 accredited) ISO/IEC 17025:2005. We are also Environment Management System accredited (ISO 14001:2004) and Quality Management System accredited (ISO 9001:2008).
plc: greener cement | home
Portland-limestone cement is engineered with a higher limestone content. PLC (Type IL) gives specifiers, architects, engineers, producers, and designers a greener way to execute any structure, paving, or geotech project, with virtually no modifications to mix design or placing procedures. All while maintaining the resilience and sustainability youve come to expect from portland cement concrete.
construction: limestone suppliers in ethiopia
Sentinel Steel PLC Is In Existence In Ethiopia Since December 2013 With The Purpose Of Manufacturing And Supply Of Quality Steel Rebars And Other Products To The Construction Industry... Read more
G6 Trading Among its supplies, the following are the major ones: Water Meter (households and industrial): Made in POLAND, Water Meter Test Benches (Made in EU), Drilling Rigs, Tools and Spar... Read more
CWW Manufacturing PLC specialized in production of PAK THERM pipe and fittings for plastic piping systems of pressure and hot water (heating) distribution in Ethiopia. Our main products are... Read more
Fluid Engineering and Trading PLC is among the most competent companies throughout the country. We also import different fittings and HDPE welding machines from China, Dubai, Italy and Turki... Read more
Habesha Cement Share Co produces two types of products. These are: Portland Pozzolana Cement (PPC) 32.5 N., Ordinary Portland Cement (OPC) 42.5 R, In the near future, the Company is planning... Read more
Mulugeta Metaferia Building Materials We Supplies High Quality Construction Materials such as Different types of Locks, Welding Equipment, Carpenter tools, Bolts and Nuts, Agricultural tools... Read more
Tsehay Industry S.C (Kaliti Metal Products Factory) manufacturing company in Ethiopia, produces Trailers & Cargo Bodies, structural and furniture hollow sections, door and window frame profi... Read more
ANCHOR Waterproofing Work is a waterproofing system specialist in Ethiopia. As a specialist for waterproofing systems, we offer the most extensive & efficient waterproofing system installati... Read more
Sador Aluminum Technics Plc import and distribute high quality aluminum profiles aluminum composit panel, hand rails & Guard rails, glass also fabrication and installation service of windows... Read more
Saba Dimensional Stones PLC produce marble, granite, limestone, special terrazzo, normal terrazzo much moreThe attractiveness, beauty and strength of saba stones have witnessed in some of t... Read more
building with stone: limestone | stone specialist
Barry Hunt considers the use of limestone as a building stone as he continues a series of articles exploring the main categories of natural stone used in construction, following his introduction to the series in last months Natural Stone Specialist.
We begin our journey through building stone with a look at limestone, probably the first widely used building material when you consider that most pre-historic caves are found in limestone massifs (a massif being a defined section of the Earths crust).
Portland has been used to build much of London since the Great Fire of 1666, including Christopher Wrens St Pauls Cathedral. And, of course, Bath stone has been extensively used in the city of the same name. But there are many more limestones available, both indigenous and imported.
Limestone is, ideally, easy to extract from the ground and to shape in the workshop. In latter years, diesel and electric power, in conjunction with hydraulics and pneumatics and, most recently, computerised controls have supplemented muscle and brain power. This increases the efficiency of extraction, processing, transporting and fixing stone, helping to keep its price down and make it competitive with other building materials especially when the whole life cost is considered. Stone has a particularly low maintenance long life.
Some of the countrys limestone cathedrals might need constant attention, but they were built perhaps 1,000 years ago and much of the stone in them dates from that time, even if some of the carvings and mouldings have been re-worked from time to time.
Limestone is most easily worked and weathers better when its properties are roughly equal in all directions, when it may be termed freestone. When masons are preparing limestones they are concerned about the ease of working them, their ability to hold a good edge (arris) and that there be no obvious splitting planes.
Historically, people have built with whatever stone was available locally, which has resulted in a wide variety of stone being used. Much of it is no longer available, which can make building conservation difficult when the ideal solution is to replace like-with-like.
It is not only warm cream and honey toned limestones, such as the Cotswold limestones, that are appreciated for building, but also the crisp whiteness and light greys of limestones that are livened by subtle natural variations in shell content, grain size and constituents other than the Calcium Carbonate (CaCO3) that constitutes pure limestone.
Limestone is ideal for large and persistent features (cornices, string courses, friezes, columns, plinths) that adorn buildings. It is also occasionally used for external paving. There was a lot of the local limestone used for the paving on the docks on the Dorest Island of Portland for the Olympic sailing events that were based there last year. It is more commonly used for interiors, although there can be issues of slip resistance, especially with imported polished hard limestones and if the floor becomes wet or greasy.
Limestone is absorbent and can become quickly stained, which is why floors, especially in commercial applications, are normally sealed thoroughly (and there is no shortage of sealers to choose from) and subject to regular maintenance to keep them sealed and cleaned.
The building engineer is usually largely concerned with the strength of stone in relation to the structure it is being used for. The best building limestones do have relatively high strength but there is a limit.
This may seem an odd statement until you realize that many of the best building limestones have been geologically weathered over millions of years. This has removed most of the potentially adverse constituents within them but also a little of their strength.
Stronger but less geologically weathered stones, such as the blue Lincolnshire limestones, may hide compounds such as pyrite that can decay rapidly once the stone is removed from the ground and they are exposed to the atmosphere. In some circumstances, the reaction can physically tear the stone apart.
The massive limestone cathedrals of the UK and elsewhere across Europe have certainly survived many centuries but they rely on their sheer size and the use of arches and buttresses to transfer lateral loads into compressive loads for their success.
This way of building changed in Georgian times with the arrival of ashlar. As ashlar, stone provides a smart exterior without having to support the building superstructure. Ashlar is typically at least 70mm thick. More recently, even thinner stone has been used, with anything below 70mm being regarded as cladding.
Modern stone cladding panels generally need to be supported individually with fixings tied back to the building frame. The cladding panels will be subject to wind buffeting that will exert forces that pull the stone panels away from the building as well as pushing them on to it, especially higher up on a building. That clearly places a flexural strain on the panels.
When limestone is used for cladding it is vital that both its properties and those of the fixings being used are carefully assessed. The whole systems ability to resist wind loading and thermal movement must be carefully calculated and a considerable margin of error allowed for.
Reducing panel sizes or increasing the fixing support will often resolve any problems but will increase the cost and might run contrary to the architects aesthetic, with increasingly large cladding panels being specified.
For some, buildings are not supposed to weather. They want buildings to look the same 20 years on as they did the day they were first opened. This is unrealistic for most building products and certainly will not be the case with limestone.
Limestone is undoubtedly durable most of it is millions of years old before it leaves the ground. But from the moment we extract it and stand it up in the atmosphere it starts deteriorating. This is compounded by our wish to use stones in environments that previous generations would have considered unsuitable. Now, more than ever, we have to consider potential durability.
The stone world is saddled with inappropriate tests that have become standard because no better alternative has yet been devised. Unfortunately, architects and engineers are not always aware of this problem and seek easy answers that are not always readily available for stone.
Water expands as it freezes, which compresses as yet unfrozen water remaining in the stone. The only way to release this pressure might be for the water to migrate into the micropores not filled under normal saturation conditions.
Does this sound too simple? Of course it is. But it is a pretty good principal to start with and is the main reason why granite and other more durable stones are used for plinths, where the stone is more likely to be subjected to moisture rising from the ground and splashed on to it by passing traffic.
The more microporous a limestone is, the longer it will hold water, which means it might be more susceptible to the deposition of dirt, which tends to stick more easily to wet, rather than dry, surfaces.
The other major problem facing limestone is salt. On exteriors, this might be from pollution, sea-spray and surrounding materials such as concrete and brick. On interiors it could be from cleaning materials or even simply from respiration if lots of people congregate in the area (over many years, people breathing can give rise to high concentrations of salts).
However, salts also concentrate in sheltered areas where they are not washed from the face. Salt laden moisture can be sucked into these sheltered, drier zones. Cornices, string courses and other protruding features are designed to throw water from a buildings vertical surfaces, providing shelter, but in doing so become the focus of salt attack.
Salts can cause discoloration problems as certain sodium and potassium based alkali hydroxides can dissolve simple organic materials, such as tannins. While there are only traces of them, if they become concentrated at the stone surface they can lead to dark brown or even almost black discolorations.
Portland cement can be a source of sodium and potassium alkali hydroxides and limestones should never be used in combination with Portland Cement or where backing or substrate concrete materials that contain Portland cement could leach into the limestone.
The list of building limestones in the UK is extensive. It includes the already mentioned Portland and Bath stones that are so well known outside of the stone industry as well as within it, but also many other great stones. There is Ancaster, Chilmark, Clipsham, Cotswold, Doulting, Ketton, Purbeck
Running parallel to the northern part of this band are the Permo-Triassic Magnesian limestones that include Cadeby and White Mansfield. We must not forget the likes of Hopton Wood, one of the few Carboniferous limestones, which has proved good enough for the Geological Museum (now the Earth Galleries of the Natural History Museum) in London.
Clunch is softer than many other limestones but its different characteristics provide it with a reasonable resistance to weathering when it has been allowed to season, although allowing stone to season is now unusual in the stone industry because of the commercial pressures. Clunch misleadingly falls apart in the various durability tests.
The Table (left) lists some of the standard tests that are applied to limestones and gives an idea of performance for the results obtained. The table is not a comprehensive guide and some stones may fare better or worse than the results shown indicate.
Aesthetically it provides a warming, natural feeling that is able to grace the greatest structures but is not out of place around the home. It will last for centuries when selected and treated appropriately.
The new 21st edition of the Natural Stone Directory is now out including more listings than ever before. For the most comprehensive coverage of the UKs natural stone quarries, stonemasons, wholesalers, equipment and service suppliers and industry related organisations order a copy now.
Natural Stone Specialist is the UKs only magazine dedicated to the natural stone industry. Each issue features some of the most interesting projects in stone, both new build and conservation, including the views of architects and designers, clients, and the masonry companies involved.
blended cements with limestone | gcp applied technologies
Portland Limestone cement has distinct advantages in terms of performance, controlling strength, reducing cost, and enhancing sustainability. There are international standards that regulate the use of Portland Limestone cement. For example, the European Standard EN 197-1 permits a number of cement types as well as setting criteria for the limestone itself. Typically the limestone needs to have CaCO3 purity >75%, have a limited clay content (methylene blue test not exceeding 1.20g/100g), and total organic carbon not exceeding 0.20% by mass for "LL" and 0.50% for "L".
The percentage of limestone used has a significant impact on the cement grinding process and ultimately on the final cement performance characteristics. It affects the grinding efficiency of the clinker, mill retention, mill internals coating, moisture input, grinding temperature, and cement flowability. Limestone also generally produces a wider particle size distribution (PSD) for the cement, with both a higher Blaine value and higher residues. Each additional 1% of limestone typically increases the Blaine SSA by 5-8 m2/kg (constant mill kWh/t).
Higher Blaine SSA and wider particle size distribution (PSD) reduces dry flowability, and this tends to be more difficult for limestone cements. It increases material filling in the mill, which is detrimental to the grinding efficiency when it is above the optimum value of void filling. The high fineness and increased moisture input increase agglomeration and coating, also leading to a negative impact on grinding efficiency.
The performance of the cement is strongly impacted by the quantity of the limestone. A wider PSD reduces paste water demand and higher fineness reduces the tendency for bleed water. However, the most noticeable effect concerns strength development, resulting from both the substitution of clinker and the effects from the PSD. The amount that the limestone reduces strength depends on the limestone percentage, the effects on PSD, cement fineness, and any cement additive present.
Cement additives can make an important contribution to grinding efficiency to counter the negative impact on flowability, void filling, coating, and PSD. Given that strength is substantially reduced in these situations, selecting the appropriate quality-improving additive is critical. Typically, there is a strong requirement to improve 28-day strength; additives based on higher alkanolamines are often the most appropriate.
Some improvements in 28-day strength are possible through finer grinding, accomplished by reducing mill output. However, the strength reduction due to higher limestone levels cannot be fully offset by a reduction in mill output alone.
Choosing the right cement additive has a marked impact on the percentage of limestone possible to achieve the target performance. For a typical 5MPa gain from the additive, it would be possible to increase the limestone by approximately 7% for the same mill output. Identifying the correct cement additive has more of an impact on limestone cement production than the effect of the mill output. Importantly, it is also usually more economically and logistically advantageous.
cement products suppliers & distributors - cemex usa - cemex
Cement is a fine powder, obtained from the calcination at 1,450C of a mix of limestone, clay, and iron ore. The product of the calcination process is clinkerthe main ingredient of cementthat is finely ground with gypsum and other chemical additives to produce cement.
Cement is the most widely used construction material worldwide. CEMEX is one of few cement companies that can meet all of your construction needs across the United States. It provides desirable properties, such as compressive strength (it has the highest strength per unit cost of any other construction material), durability, and aesthetics to a variety of construction applications. CEMEXs high quality can help you lower the total cost of your project.
effects of portland cement replacement with limestone on the properties of hardened concrete - sciencedirect
Limestone portland cement has a lower environmental impact during the production phase in comparison with portland cement. However, the environmental advantages initially gained should be correlated to the long-term performance of concrete structures. Hence, the knowledge of the long-term properties, and in particular durability performance, is essential to assess the actual environmental impact of limestone replacement. In the literature, there is disagreement on durability behaviour and the contribution of limestone to the resistance to chloride and carbonation penetration is controversial. In this paper, the effect of the percentage of replacement of portland cement with ground limestone, water/binder ratio and cement content on compressive strength, electrical resistivity, sorptivity and resistance to carbonation and chloride penetration was evaluated. Results showed that both mechanical properties and resistance to penetration of aggressive agents decreased by replacing 15% of portland cement with limestone; a further decrease occurred with 30% limestone.