Determining the optimum dosage of a superplasticizer is essential for achieving the desired workability, strength, and durability of concrete while avoiding unnecessary admixture consumption. Two of the most widely used laboratory methods for this purpose are the Marsh Cone Test and the Mini Slump Cone Test. In this article, you will learn both methods step … Read more
Solid Content Test of Admixture Chemical admixtures have become an essential component of modern concrete, particularly when high workability is required without increasing the water content. Depending on the product, admixtures are supplied either as liquids or as powders. Solid content of admixture impacts its properties. Measuirng solid content helps in following ways. Test Summary … Read more
Strength Activity Index (SAI) Test (ASTM C311/C311M) Ordinary Portland Cement (OPC) production is highly energy-intensive and contributes significantly to carbon emissions. To reduce cement consumption and improve sustainability, supplementary cementitious materials (SCMs) are incorporated into concrete. Many of these materials exhibit pozzolanic properties, meaning they react with calcium hydroxide [Ca(OH)₂], a by-product of cement hydration, … Read more
Concrete is no longer just a mixture of cement, sand, aggregates, and water. Modern structures such as high-rise buildings, long-span bridges, marine structures, metro projects, and industrial plants demand concrete that is stronger, denser, and far more durable than conventional concrete. One material that has completely changed the way high-performance concrete is produced is silica … Read more
Objective For determination of relative density of liquid admixture. Reference Standards IS : 9103-1999 – Concrete admixtures specification Equipment & Apparatus Constant temperature bath Hydrometer Measuring cylinder(500 ml) Procedure About 400 ml of admixture is placed in a 500 ml graduated cylinder. The hydrometer is inserted into the cylinder. When it has reached the equilibrium … Read more
Objective The ash content which gives an indication of inorganic constituents is determined by igniting the admixture at 6000C to remove any organic material. Reference Standards IS : 9103-1999 – Concrete admixtures specification Equipment & Apparatus Oven(3000C) Bottle Balance(0-10kg) Procedure About 1 g of sample is placed in a porcelain crucible. The crucible is then placed … Read more
Objective For determination of dry material content of liquid admixtures. Reference Standards IS : 9103-1999- Concrete admixtures specification Equipment & Apparatus Oven(3000c) Bottle Balance(0-10kg) Procedure 25 to 30 g of preheated, completely dry sand is placed in a wide mouth glass weighing bottle provided with ground glass stopper. The bottle with sand and stopper is … Read more
Subscribe to our mailing list below and never miss the latest blog post.
