ADDITIVE FOR CONTROLLING FLEXURAL BOND STRENGTH, AIR ENTRAINEMENT AND WORKABILITY OF MORTAR CEMENT

摘要

A mortar cement composition is composed of a cement or ground portland cemen t clinker, ground limestone and/or lime, sand, a sufficient amount of water to render the composition flowable, and at least one water-soluble polymer present in the amount having a lower limit of about 0.001 wt.% and an upper limit of about 0.04 wt.% based on total dry weight of the ingredients, with the proviso that the extent of adsorption of the polymer onto the cement is less than 50 %, and wherein the resulting mortar has 8-16 % air content and greater than 70 psi flexural bond strength. This mortar cement composition i s for use in building structures in all seismic zones.