A review on the utilization of fly ash

Impact of admixtures on the hydration kinetics of Portland cement

Corrosion inhibitors for steel in concrete: State-of-the-art report

Chemical admixtures — Chemistry, applications and their impact on concrete microstructure and durability

Chemical admixtures are often used to alter the course of cement hydration reactions and the properties of fresh or hardened concrete. The admixtures, in most cases organic compounds, can perform such functions through various types of physico-chemical interactions with the hydrating cement phases. To understand the consequences of admixture-cement interactions, and to optimize the functional properties of admixtures, appropriate descriptions of their mode of action must be developed. An overview of the latter is attempted here, drawing mainly from: (1) the chemistry and phenomenology of cement hydration; (2) a review of the various types of molecular processes in which admixture molecules can be involved at the solid-solution interface; (3) selected experimental data on the influence of water reducers and superplasticizers which illustrate some basic features of admixture-cement interactions.

Chemical admixture-cement interactions: Phenomenology and physico-chemical concepts

Following the substantial increase in the use of chemical admixtures in concrete, the book provides information on materials of this type. Details are given of the specification, use and design of concrete mixtures with information on the types, mode of action, effect and application of the major types of chemical admixtures in the following sections: water-reducing agents; air-entraining agents; concrete waterproofers; accelerators; application of admixtures; and, analysis of hardened concrete for admixture type and quantity. (TRRL)

M R Rixom

Papers

Chemical admixtures for concrete