Dry powder mortar
A technology of dry powder mortar and mortar, which is applied in the field of building materials, can solve problems such as the shortage of yellow sand resources and the shortage of dry powder mortar raw materials, and achieve the effects of promoting promotion, solving stacking problems, and reducing costs
Inactive Publication Date: 2010-10-27
泰州枫叶冶金设备有限公司
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is: to overcome the shortage of existing yellow sand resources and the shortage of dry powder mortar raw materials, and to provide a dry powder mortar with less yellow sand consumption
Method used
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[0023] Examples 1-5, according to the mass ratio in Table 1, weigh different raw materials and mix evenly, add 17-22% water and stir evenly. The cement used in the test is 42.5 ordinary Portland cement, the fineness modulus of yellow sand is 2.5, the fineness modulus of precision casting waste sand is 1.8, and the fly ash is Class II ash.
[0024] It can be seen from the test results in Table 1 that when the ratio of waste sand to sand in precision casting is 50%, with the increase of cement dosage and lime-sand ratio, dry powder mortar with different strength levels of 5-20 MPa can be prepared.
[0025] Table 1 Preparation of dry powder mortar with different strength grades in the case of mixing yellow sand and precision casting waste sand
[0026]
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Abstract
The invention relates to the field of building materials, in particular to preparing dry powder mortar by utilizing precision casting waste sand. The dry powder mortar is prepared by mixing 13-35 percent of cement, 3-4 percent of pulverized fuel ash, 30-40 percent of yellow sand, 2.7-3.4 percent of mortar thickening powder, 0.01-4 percent of admixture, and 30-40 percent of precision casting waste sand. In the invention, the dry powder mortar is prepared on the premise of ensuring the same dry powder mortar performance through pretreating the precision casting waste sand by utilizing the precision casting waste sand as an aggregate to replace part of yellow sand. Thus, not only the stacking problem of the precision casting waste sand can be solved but also the cost of the dry powder mortar can be reduced, thereby promoting the popularization of the dry powder mortar and meeting the environmental protection policy for energy saving and emission reduction in China.
Description
technical field [0001] The invention relates to the field of building materials, in particular to preparing dry powder mortar by using precision casting waste sand. Background technique [0002] Investment casting generally adopts the investment casting method, which mainly uses mullite and zircon sand as the main raw materials, and is bonded with silica sol, which is an important part of my country's foundry industry. It has been used in my country since the 1950s, and precision casting has developed rapidly since the 1990s. In 2003, there were 1,650 large-scale precision casting enterprises in my country. In 2010, there were more than 1,000 precision casting enterprises in Zhangguo and Dainan areas of Taizhou City, Jiangsu Province alone, and the waste sand of precision casting was about 150,000 tons. The discharge of a large amount of investment casting waste sand is not only a waste of resources, but also causes serious environmental pollution. [0003] Dry powder mort...
Claims
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IPC IPC(8): C04B28/00C04B28/04C04B18/04
CPCC04B40/0608C04B28/02Y02W30/91C04B14/068C04B18/0427C04B18/08C04B2103/44C04B14/06
Inventor 鞠宇飞肖雪军唐惠东叶希徐开胜侯林燕蒋恒蔚孔凡宝
Owner 泰州枫叶冶金设备有限公司
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