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The compatibility between the superplasticizers and Portland cements


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  • Product Description

The compatibility between Portland cements and superplasticizers depends on the interaction between them. It is governed by the characteristics of the materials gained from the individual manufacture processes. The effects of the polycondensate- and polycarboxylate superplasticisers on the slump behavior of four Portland cements is studied. High dosages from the polycondensates create fluidity in cements with significant amounts of C3A- or aluminate phases and gypsum. The initial fluidity and slump retention are enhanced by the inert limestone surfaces added to Portland cement, by the glassy phases of the red-brick powder and by the porosity of the ferric hydroxide gel in C4AF-rich systems. Small dosages are needed from the polycarboxylates to make the cements flowable. The affinity of the molecules to the cement surfaces increases with increased charge density and affects the slump retention negatively. The steric repulsion which constrains the mobility of the free methylene groups in the backbone chains, is governed by the conformation of the chains in the polymer structure and leads to a better slump retention.

Product Specifications
SKU :COC83116
AuthorHanaa Youssef Ghorab,Ihsan M. Kenawi and Ziad G. Abdel All
Number of Pages120
Publishing Year2011-02-17T00:00:00.000
Edition1 st
Book TypeEnvironmental science, engineering & technology
Country of ManufactureIndia
Product BrandLAP LAMBERT Academic Publishing
Product Packaging InfoBox
In The Box1 Piece
Product First Available On ClickOnCare.com2015-10-08 00:00:00