Ores And Minerals #3773655

Natural Gypsum is Calcium Sulphate Dihydrate (CaSO4.2H2O) deposited in sedimentary layers on the sea bed. Under high pressure and temperature Gypsum turns into Anhydrite (CaSO4). Natural Gypsum/Anhydrite are produced from open-cast mines, or underground mines. Natural Gypsum is normally only screened to remove ‘fines’ (mainly mudstones), then crushed and finely ground for various applications.

Natural Gypsum is an indispensable component of Ordinary Portland Cement as it has a great influence on water consumption of standard consistence and strength simultaneously. During the cement manufacturing process, 4%-6% of Natural Gypsum (by weight) in crushed form is introduced during the final grinding process upon cooling of clinker. It plays an important role in controlling the rate of hardening or setting of cement. If not added, the cement will set immediately after mixing of water leaving no time for concrete placing

Over 60% of Natural Gypsum produced across the world is used in cement manufacturing. Other applications include production of plaster, plasterboards, Gypsum fibreboard and Gypsum blocks. It can also be used as a soil conditioner and has various other specialized applications. An important property of Gypsum is that it is naturally fire-resistant.

We source Natural Gypsum directly from mines in Oman, and export to various destinations across the world.

CEMGUARD Fly Ash is a pozzolanic material, captured in electro-static precipitators as a by-product from coal-fired thermal power stations. It consists of small, hard and spherical particles rich in silica (glass) and alumina, with pozzolanic properties. It complements Portland cement upon hydration by reacting with free lime (calcium hydroxide) to form an additional durable binder, namely calcium silicate hydrate. The spherical particles also have a ball-bearing effect, which allows concrete to be produced using less water.CEMGUARD Fly Ash is subject to processing quality control to regulate its fineness (particle size and distribution, shape and glass content) and unburnt carbon (loss-on-ignition), thus giving quality-assured material which is consistent, predictable and suitable for varied applications. We are working towards CE Marking for CEMGUARD Fly Ash.CEMGUARD Fly Ash is mainly used as a partial replacement of cement in concrete, and has unique properties that benefit both fresh and hardened concrete. Its key advantages include reduced heat of hydration, improved workability, enhanced durability and longer setting time. It can be effectively used where aggregates have poor grading and shape, resulting in bleeding and segregation. It is also suited for mass concrete applications, and in hot and aggressive environments where early-age thermal cracking and durability are major concerns. General replacement of cement with CEMGUARD Fly Ash in concrete can be 15-35% by weight for normal structures. However, for special structures such as dams, the replacement levels can increase up to 70%. The service life of structures using CEMGUARD Fly Ash is enhanced by more than 100% on account of superior durability of concrete. Fly Ash use in concrete qualifies for credit under the U.S. Green Building Council's popular LEED rating system for sustainable construction.

CEMGUARD Microsilica (Silica Fume) is a by-product of producing silicon metal or ferrosilicon alloys in smelters using electric arc furnaces. It is a grey coloured powder, pozzolanic in nature. It is sourced from a single, dedicated factory in China and produced under strict quality control to maintain the highest levels of product consistency, and ensure minimum standard deviation. In concrete, it fills the space between cement grains - commonly referred to as particle packing or micro-filling. It also reacts with the calcium hydroxide from cement to form an additional binder called calcium silicate hydrate. Both these effects enhance the physical and chemical properties of concrete.

Natural Gypsum is Calcium Sulphate Dihydrate (CaSO4.2H2O) deposited in sedimentary layers on the sea bed. Under high pressure and temperature Gypsum turns into Anhydrite (CaSO4). Natural GypsumAnhydrite are produced from open-cast mines, or underground mines. Natural Gypsum is normally only screened to remove fines (mainly mudstones), then crushed and finely ground for various applications.Natural Gypsum is an indispensable component of Ordinary Portland Cement as it has a great influence on water consumption of standard consistence and strength simultaneously. During the cement manufacturing process, 4%-6% of Natural Gypsum (by weight) in crushed form is introduced during the final grinding process upon cooling of clinker. It plays an important role in controlling the rate of hardening or setting of cement. If not added, the cement will set immediately after mixing of water leaving no time for concrete placing, Over 60% of Natural Gypsum produced across the world is used in cement manufacturing. Other applications include production of plaster, plasterboards, Gypsum fibreboard and Gypsum blocks. It can also be used as a soil conditioner and has various other specialized applications. An important property of Gypsum is that it is naturally fire-resistant.

CEMGUARD Fly Ash is a pozzolanic material, captured in electro-static precipitators as a by-product from coal-fired thermal power stations. It consists of small, hard and spherical particles rich in silica (glass) and alumina, with pozzolanic properties. It complements Portland cement upon hydration by reacting with free lime (calcium hydroxide) to form an additional durable binder, namely calcium silicate hydrate. The spherical particles also have a ball-bearing effect, which allows concrete to be produced using less water.

CEMGUARD Fly Ash is subject to processing/ quality control to regulate its fineness (particle size and distribution, shape and glass content) and unburnt carbon (loss-on-ignition), thus giving quality-assured material which is consistent, predictable and suitable for varied applications. We are working towards CE Marking for CEMGUARD Fly Ash.

CEMGUARD Fly Ash is mainly used as a partial replacement of cement in concrete, and has unique properties that benefit both fresh and hardened concrete. Its key advantages include reduced heat of hydration, improved workability, enhanced durability and longer setting time. It can be effectively used where aggregates have poor grading and shape, resulting in bleeding and segregation. It is also suited for mass concrete applications, and in hot and aggressive environments where early-age thermal cracking and durability are major concerns. General replacement of cement with CEMGUARD Fly Ash in concrete can be 15-35% by weight for normal structures. However, for special structures such as dams, the replacement levels can increase up to 70%. The service life of structures using CEMGUARD Fly Ash is enhanced by more than 100% on account of superior durability of concrete. Fly Ash use in concrete qualifies for credit under the U.S. Green Building Council's popular LEED rating system for sustainable construction.

Applications of CEMGUARD Fly Ash encompass structural and ready mix concrete, cement, plastering and brick mortar, pre-cast and pre-stressed concrete, pumped concrete, bricks and blocks. CEMGUARD Fly Ash can either be pre-blended with the cement or sold separately for subsequent blending at the concrete batching plant. It is recommended that the volume of water may be reduced by 2.5% and quantity of sand may be reduced by 0.5% for every 10% of CEMGUARD Fly Ash used instead of cement in concrete. Apart from the use of CEMGUARD Fly Ash in blended cements or as a direct addition in concrete manufacture, CEMGUARD Fly Ash may also be used as a raw material ingredient in clinker production where the silica and alumina contents are of particular interest. Non cementitious uses for CEMGUARD Fly Ash are wide ranging and include use in roads, asphalt, soil and waste stabilisation, lightweight aggregates, etc. It can also be used to replace the filler ingredient of asphalt mix, which is usually 7-10%, leading to reduction in bitumen consumption by 10-15% resulting in a superior asphalt mix and cost-savings.

CEMGUARD Fly Ash is a pozzolanic material, captured in electro-static precipitators as a by-product from coal-fired thermal power stations. It consists of small, hard and spherical particles rich in silica (glass) and alumina, with pozzolanic properties. It complements Portland cement upon hydration by reacting with free lime (calcium hydroxide) to form an additional durable binder, namely calcium silicate hydrate. The spherical particles also have a ball-bearing effect, which allows concrete to be produced using less water. CEMGUARD Fly Ash is subject to processing quality control to regulate its fineness (particle size and distribution, shape and glass content) and unburnt carbon (loss-on-ignition), thus giving quality-assured material which is consistent, predictable and suitable for varied applications. We are working towards CE Marking for CEMGUARD Fly Ash. CEMGUARD Fly Ash is mainly used as a partial replacement of cement in concrete, and has unique properties that benefit both fresh and hardened concrete. Its key advantages include reduced heat of hydration, improved workability, enhanced durability and longer setting time. It can be effectively used where aggregates have poor grading and shape, resulting in bleeding and segregation.

CEMGUARD Microsilica (Silica Fume) is a by-product of producing silicon metal or ferrosilicon alloys in smelters using electric arc furnaces. It is a grey coloured powder, pozzolanic in nature. It is sourced from a single, dedicated factory in China and produced under strict quality control to maintain the highest levels of product consistency, and ensure minimum standard deviation. In concrete, it fills the space between cement grains - commonly referred to as particle packing or micro-filling. It also reacts with the calcium hydroxide from cement to form an additional binder called calcium silicate hydrate. Both these effects enhance the physical and chemical properties of concrete. CEMGUARD Microsilica is available in two dry powder forms - densified and undensified. Densified Microsilica is most popularly used in concrete construction. It is produced by tumbling undensified Microsilica particles in a silo, to form agglomerates with bulk densities between 500-700 KGm3. Undensified Microsilica (bulk density between 200-350 KGm3) is only used in specialized applications as it is not economical to transport because of its low bulk density. Quality-controlled and consistent Microsilica with uniform colour, and sourced from a single, dedicated factory is the key to maximizing its value in various applications. The production facilities of CEMGUARD Microsilica have an in-house laboratory for testing of key parameters such as retention over SiO2 content, loss-on-ignition and moisture as per standard codes, while bulk density is controlled during the densification process.