Hydration control set-regulating liquid admixture for extended life mortars
BATIMIX MR 660 is a synthetically produced liquid set-regulator, classified as a retarding type admixture, used for producing extended life mortars conforming to the requirements of ASTM C 1142 standard specification for extended life mortar for unit masonry.
Conventional mortars are prepared at the job-site. Extended life mortars are produced at manufacturing plants and delivered to the job site at ready-to-use consistencies. On-site, they are stored in containers that minimize moisture loss from evaporation, providing adequate protection from freezing in cold weather.
The initial hydration of extended life mortars is controlled through the incorporation of BATIMIX MR 660. It allows the mixture to remain plastic and workable for a period varying from 24 to 36 hours. At any time over that period, when the mortar is used, suction by the masonry units occurs, and the initial set takes place in a normal manner.
Extended life mortars that have stiffened due to a loss of water by evaporation can be retempered. This should not take place more than once over the working life of the mortar. To restore the mortar to the required consistency, water is added. Early strength development allows for the walls to be constructed at a normal rate. The mortar retains enough water to ensure long-term strength development.
Applications using BATIMIX MR 660 include all types of extended life mortars used for masonry applications, such as plastering, rendering, pointing, and bricklaying.
Mortars prepared with BATIMIX MR 660 are characterized by the following:
In the plastic state:
In the hardened state:
0.6% to 1.4% of the cementitious materials
Brown liquid
BATIMIX MR 660 is not a hazardous material. However, it should not be swallowed or allowed to come into contact with skin and eyes. Suitable gloves and goggles should be worn. For additional information, kindly refer to the product’s Material Safety Data Sheet.
ReferenceMS-PR-5616