Research On Manufacture And Application Special Masonry Cement And Mortar For New Type Wall Materials

Construction mortars were widely used in the civil engineering,but there are some problems such as its low compresive strength,lacking of engineering monitoring,so site-made mortar has been used so far.Recent years,to improve and stabilize the quality of mortar,some large cities have started to introduce ordinaryfactory-made mortar,and Guangzhou was the frontiercity in the country to promote the use of ordinary factory-made mortar.There are two types of ordinary factory-made mortarsabroad including wet-mixed mortar and dry-mixed mortar.Other than that two types of mortars,costruction mortar power,semidry mortar and masory cement mortar exisited in our country.Wet-mixed mortar is a kind of transition mode because it is unsuitable for construction orgination.Dry-mixed mortar is suitable for special factory-mixed mortar,not suitable for ordinary mortar and plastering mortar.As there were no related technical standard,semidry method mortar is also a kind of transition mode.Due to its lower cost and stability quality,special masory cementhas become relatively appropriate product.Masonry cement for new wall materials is a kind of cement composed of one or more than one kind of material including appropriate clinker,gypsumand cellulose ether.Research and application of masonry cement can promote recycling in solid waste,reduce waste discharge and resource consumption in the process of cement production and promote building energy saving and innovation of wall materials.All these will exert practical and long-term significance to sustainable development of economy and construction insudtry in Guangzhou city and Guangdong province.In this paper,the compositions of masonrycement were optimized,a large number of industrial waste(more than 50% mixed parameters)were fully utilized,its water retention rate was improved to 90%,some other properties such as compressive strength and stability met the requirements of national standard “masonry cement”.Wide-range pilot scale test of masonry cement and engineering application of novel wall materials were conducted,which indicated that the use of special masonry cement technology can reduce the cost of dry-mixed mortar,solve some problems such as cracking and bulging.