First evaluate the physical, mechanical and Chemical properties ( Permeability, Mass loss, Compressive , Tensile strength , Flexural and Retention of water/ Better hydration with time , pozzolanic and W/C Ratio ) as the use of self-curing agent improves all these types of properties of the materials as follows
[1]Results show that use of self-curing agent (Ch.) in concrete effectively improves the physical properties compared with conventional concrete.
[2] Up to 20% saturated leca was effective for permeability and mass loss but adversely affects the sorptivity and volumetric water absorption.
[3]Self-curing agent Ch. was more effective than self-curing agent leca. In all cases, both 2% Ch. and 15% leca were the optimum values. Higher cement content and/or lower water–cement ratio leads to more effective results of self-curing agents in concrete. Incorporation of silica fume into concrete mixtures enhances all physical properties.
[4]The mechanical properties of concrete containing self-curing agents are investigated as follows: Two materials were selected as self-curing agents with different amounts, and the addition of silica fume was studied. The self-curing agents were, pre-soaked lightweight aggregate (Leca); 0.0%, 10%, 15%, and 20% of volume of sand; or polyethylene-glycol (Ch.); 1%, 2%, and 3% by weight of cement. To carry out this study the cement content of 300, 400, 500 kg/m3, water/cement ratio of 0.5, 0.4, 0.3 and 0.0%, 15% silica fume of weight of cement as an additive were used in concrete mixes. The mechanical properties were evaluated while the concrete specimens were subjected to air curing regime (in the laboratory environment with 25 °C, 65% R.H.) during the experiment.
The results show that, the use of self-curing agents in concrete effectively improved the mechanical properties.
[5]The concrete used polyethylene-glycol as self-curing agent, attained higher values of mechanical properties than concrete with saturated Leca. In all cases, either 2% Ch. or 15% Leca was the optimum ratio compared with the other ratios. Higher cement content and/or lower water/cement ratio lead(s) to more efficient performance of self-curing agents in concrete. Incorporation of silica fume into self-curing concrete mixture enhanced all mechanical properties, not only due to its pozzolanic reaction, but also due to its ability to retain water inside concrete.
[6] Water retention for the concrete mixes incorporating self curing agent is higher compared to conventional concrete mixes, as found by the weight loss with time.
i[7] Self-curing concrete results in better hydration with time under drying condition compared to conventional concrete.
[8] Performance of the self-curing agent is affected by the mix proportions mainly the cement content and the w/c ratio.
[9] Use of Polyvinyl alcohol (0.48% by the weight of cement) as self curing agent provides higher compressive, tensile as well as flexural strength than the Strengths of conventional mix.
[10] Increase in % of polyvinyl alcohol results in reduction of weight loss.
[11]Durability of self-curing concrete to sulphate salts and chloride induced corrosion is affected.
Very comprehensive comments by manohar seghal....hopefully it is as much help to you as it has been to me
Manohar Seghal has pretty much covered al aspects for the question.
thermal expansion coefficient. But first the compressive strength should be reached.
first the shrinkage limit, the thermal expansion coefficient, the characteristic strength for 5% deformation and the minimum day to reach the maximum strength all this has to be considered before using self curing agent
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