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A platform for research: civil engineering, architecture and urbanism
Supplementary cementitious materials during the hydration of portland cement
Cement production is a highly energy intensive production process and emits a large amount of CO2. This places cement as the third biggest greenhouse gas culprit after the transport industry and energy generation sectors. Because of these, health hazards are of major concern of the world. There are large numbers of industrial and agricultural wastes which when mixed with cements, many times enhanced the cementitious properties. These materials are known as supplementary cementitious materials (SCMs). The combination of SCMs and cements are known as blended cements or composite cements. During the past, cementitious properties of variety of blended cements have been studied extensively. The most common ingredients for blending with Portland cement clinkers are latent hydraulic component (e. g. granulated blast furnace slag), or pozzolanic components such as natural pozzolana, fly ash, condensed silica fume, burnt clay, sugar cane baggase ash, rice husk ash or filler component like lime stone, etc. The use of these materials has the advantage of low costs and better durability, but the disadvantage of a longer setting time and a slower early strength development. Attempts are being made to overcome these disadvantages. In this review article details of chemistry of hydration of Portland cement in the presence of SCMs will be discussed.
Supplementary cementitious materials during the hydration of portland cement
Cement production is a highly energy intensive production process and emits a large amount of CO2. This places cement as the third biggest greenhouse gas culprit after the transport industry and energy generation sectors. Because of these, health hazards are of major concern of the world. There are large numbers of industrial and agricultural wastes which when mixed with cements, many times enhanced the cementitious properties. These materials are known as supplementary cementitious materials (SCMs). The combination of SCMs and cements are known as blended cements or composite cements. During the past, cementitious properties of variety of blended cements have been studied extensively. The most common ingredients for blending with Portland cement clinkers are latent hydraulic component (e. g. granulated blast furnace slag), or pozzolanic components such as natural pozzolana, fly ash, condensed silica fume, burnt clay, sugar cane baggase ash, rice husk ash or filler component like lime stone, etc. The use of these materials has the advantage of low costs and better durability, but the disadvantage of a longer setting time and a slower early strength development. Attempts are being made to overcome these disadvantages. In this review article details of chemistry of hydration of Portland cement in the presence of SCMs will be discussed.
Supplementary cementitious materials during the hydration of portland cement
Singh, N.B. (author)
2010
8 Seiten, 6 Bilder, 5 Quellen
Conference paper
English
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