Construction World April 2017

Chemical solutions company CHRYSO Southern Africa recommends the use of CHRYSO ® Stab rather than water in order to retain workability of plaster or mortar.

In conjunction with the appropriate protection, typical dosages of CHRYSO ® Stab will produce brick laying mortars with pot lives of eight to 36 hours.

mixing with the sand. Machine mixing is preferable, if not essential. Products from the CHRYSO ® Fuge range can also be added to mortar or plaster to prevent the ingress of moisture through the wall. By reacting with calcium hydroxide produced by the cement, pores within the plaster or mortar are blocked and this prevents moisture from penetrating the surface of the plaster or mortar.

Mechanical mixing is another important contributor to a good quality mortar or plaster, as are the right mix proportions. Where volumes are sufficiently large enough, many readymix concrete companies are able to provide sites with quality controlled retarded mortars and plasters. This eliminates many of the problems associated with volume based site batching. 

the CHRYSO ® Cure range. Another useful product when dealing with mortars and plasters is a bonding agent called CHRYSO ® Cim. CHRYSO ® Cim is very effective in improving the bond, but only if the substrate has been properly prepared. CHRYSO ® Pigments can also be used to impart colour to the mortar or plaster. For uniform colour, the pigment should be thoroughly mixed with the cement prior to

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CONSTRUCTION WORLD APRIL 2017