Viscosity Modifying Admixture (VMA) Admixtures known as viscosity-modifying admixtures, or VMAs, are used to alter the viscosity, cohesiveness, workability, and other characteristics of freshly mixed concrete. The next section discusses the function of VMA and its applications in various types of concrete. The purpose of the VMA (viscosity-modifying additive) in concrete The primary purpose of […]
Special Cement Certain purposes call for the use of special cements in the construction of masonry and concrete. These include changing how concrete sets or hardens, creating various architectural effects, improving workability, adding water retention and flexibility to masonry, preventing water from penetrating walls or containment containers, and lowering the cost of the cementing agent. […]
Cement Hydrations Cement hydration is the name given to the chemical reaction that occurs when cement and water come into contact. This reaction releases heat during its course, which is known as the “heat of hydration.” The reaction is exothermic in nature. Cement typically generates 90–100 cal/gm of heat in 28 days and 89–90 cal/gm […]
The Penetration Resisting Test The penetration resistance test is used to measure the water content, the kind and quantity of cementitious material, the admixtures, and the impact of these factors on the concrete’s setting time. It also determines the concrete’s initial and final setting times in laboratories and on project sites. A sample of mortar […]