Sensitivity analysis of titanium gypsum aggregate wrapping process based on entropy weight method
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Abstract
Taking the resource utilization of titanium gypsum as the core, in order to explore its application potential in the field of building materials, this paper takes titanium gypsum powder as the main material, mixed with a certain proportion of cement, silica fume, activator and binder, etc., and designs the indoor test scheme of different granulator speed, balling time and curing conditions. The unburned ceramsite with stable structure and reliable strength is prepared. The strength and water absorption index are measured based on the requirements of the standard standard. The results are as follows : ( 1 ) By analyzing the aggregate shape coefficient, bulk density and cylinder compressive strength, it is known that the bulk density of the prepared titanium gypsum coated ceramsite is between ' > 900 ' and ≤ 1000 '. The apparent density is between 1700-2200 kg / m3, which belongs to 1000 grade artificial aggregate. In the test scheme, only A5, A7 and A8 meet the basic requirements of aggregate. ( 2 ) Based on the entropy weight method, the sensitivity analysis of cylinder compressive strength, water absorption and single aggregate bearing capacity of different test groups was carried out. The results showed that the order of influence on the bearing capacity of single aggregate at 14 d age was molding time > rotation speed > curing condition. The order of influence of cylinder compressive strength at 14 d age is molding time > rotational speed > curing condition. The order of influence on the water absorption of 1h at 14 d age is molding time > curing condition > rotational speed. This study can provide a basis for resource design.
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