Slump control factor

Slump control factor (by volume)=Vp+Vw (Ifisn ) Vc, Vp, Va, Vw, Vs, Vg Volumes of cement, polymer, air, water, sand, and gravel per unit volume of latex-modified concrete, respectively (l/m )... 

The slump (St) of latex-modified concrete can be predicted with every polymer type and at each sand-aggregate ratio by using slump control factor (q>) as follows ... 

Figures 4.1 and 4.21 1 1 represent the effect of unit water content (or water-cement ratio) and polymer-cement ratio on the consistency of latex-modified mortars and concretes, respectively. The flow of the latex-modified mortars increases with increasing water-cement ratio and polymer-cement ratio. The slump of the latex-modified concretes tends to increase with rising unit water content (or water-cement ratio) and polymer-cement ratio, and at each unit water content, a rise in the polymer-cement ratio causes an increase in the slump. This tendency is more significant at smaller sand-aggregate ratios and at large unit cement content Considering these factors, Ohama, et al.Pi have expanded Lyse s rule of constant water contenton ordinary cement concrete, W and defined slump control factor as follows ...

In general, electrochemical methods are in competition with rehabilitation utilizing an overlay such as low-slump, high-performance, or latex-modified concrete. The deck condition is often the controlling factor in the selection of the rehabilitation method. In some instances, a combination of these methods is selected. For example, electrochemical removal of chloride followed by an overlay or an overlay in conjunction with CP to noitigate any further corrosion. 

The water-reducing admixtures are the group of products which possess as their primary function the ability to produce concrete of a given workability, as measured by slump or compacting factor, at a lower water-cement ratio than that of a control concrete containing no admixture. 

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