Effect of Selected Compounds on Cement Hydration

The CaCl would be attributed to the first group, together with the higher temperature of concrete curing, (see curve 1 in Fig. 4.21) these two factors shorten the 

In this figure the effect of set and hardening retarders is also shown. The induction period is elongated, the second heat evolution peak is extended, with lower maximum (curve 4). 

The other organic accelerators ate carboxyl acids, formaldehyde, cationic polyesters, phenol resins and epoxy resins [54], 

The effect of CaCl2 on the constitution of C-S-H gel has been a subject of munerous studies for many years. There is a great impact of chloride, on such 

One caimot forget the modified morphology of C-S-H when the effect of CaCl2 is discussed. The changes are visible particularly at early age of hydration they are not significant at later period. There is generally accepted that the chlorides cause layer forms to occur while without this admixtures the fibrous C-S-H is dominating. In the opinion of Skalny and Odler [66] the latter one is composed of rolled layers. 

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