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US4921537A Shrinkage compensated mortar material 失效
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Shrinkage compensated mortar material
摘要:
A shrinkage compensated mortar or grout can be made with about 40 to 60% by weight of fine aggregate and 40 to 60% by weight of a hydraulic composition which in turn is made with 60 to 80% by weight of mixture of rapid hardening cement and 20 to 40% portland cement; and based on the weight of cement, 5 to 8% by weight of silica powder; 0.2 to 0.4% by weight of a hydroxycarboxylic acid or a salt thereof; and 2 to 3% by weight of a high performance water-reducer. Such shrinkage compensated mortars or grouts are useful in the installation of machinery, foundations for major structures and the like.
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