Corrosion inhibitors are admixtures that either extend the time to corrosion initiation or significantly reduce the corrosion rate of embedded metal, or both, in concrete containing chlorides in excess of the accepted corrosion threshold value for the metal in untreated ...
Category: Concrete Admixtures
Admixtures are used to modify properties of concrete in fresh and hardened state. Articles on concrete admixtures are presented.
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Functions of Admixtures in Fresh and Hardened State of Concrete
admixtures (singular or combination of admixtures) are added to concrete or mortar or grout mixture to achieve or improve desired properties in the fresh or hardened state. The admixtures are added to concrete based on their functions which they are ...
Factors Affecting Performance of Admixtures in Concrete
There are many factors that influence the performance of admixtures in concrete such as type of admixture, dosage, compatibility of the admixture with cement, mix design, ambient temperature, and the presence of other admixtures. These factors influence the degree of ...
Applications of Rice Husk Ash in Building Constructions
Rice husk ash (RHA) plays two roles in concrete constructions. The first role is using rice husk as a substitute for Portland cement which leads to the reduction of the cost of concrete, and the other role is as an ...
High-Range Water Reducing Admixture for Concrete
High range water reducing admixture reduces the quantity of mixing water required to produce concrete of a given consistency by 12 % or greater, as per ASTM C 494- C 494M. It is capable of producing great water reduction, great ...
Microsilica in Concrete – Types, Properties, and Practical Applications
Microsilica in concrete improves its strength and durability as it provides more uniform distribution and a greater volume of hydration products, and decreases the average size of pores in the cement paste. Microsilica, also known as silica fume or condensed ...
Polymer Modified Mortar – Types, Properties, and Applications
Polymer modified mortar is produced by mixing water with polymeric admixtures, Portland cement, and sand. The addition of polymer improves mortar’s performance and consequently can be utilized advantageously and economically in several applications. Latex polymers, redispersible dry polymers, water-soluble polymers ...
Viscosity Modifying Admixtures (VMAs) in Concrete
Viscosity Modifying admixtures or VMAs are the admixtures used to change the properties such as viscosity, workability, cohesiveness etc. of fresh concrete. Function of VMA and Applications in different types of concretes are discussed below. Function of Viscosity Modifying Admixture ...