DOI / 249 cial to reduce the viscosity of mortar When the content of stone powder is 3% and 6% the flow effect of mortar is more obvious When the shear rate is less than 30 rpm the mortar with high
·The experimental results show The MB value of machine made sand has obvious negative effects on concrete performance and admixtures The rock powder content and the fineness module have
·The experimental results show The MB value of machine made sand has obvious negative effects on concrete performance and admixtures The rock powder content and the fineness module have relatively little influence on the working performance of concrete The negative effect can also be reduced by adjusting the sand ratio but the amount of
·Machine made sand MS has become a hot topic in construction materials due to the depletion and scarcity of natural river sand Aggregate micro fines AMF of varied contents were included in MS during the manufacturing process To quantify the filling role of
·The cumulative screening rate and fineness modulus of machine made sand have a good correlation with the yield stress of the mortar and the mechanism is Sand gradation is significantly
·Machine made sand was first removed by dry sieving and then mixed with tuff stone powder to adjust the stone powder content of fine aggregates We used the full calculation method to perform preliminary tests on the properties of the machine made sand concrete The mix ratio was optimized by considering the level of factors and the number of tests
·The Basic Ingredients of Concrete Concrete is made through the careful mixture of four main components water a combination of sand and gravel often referred to as aggregate cement and certain additives Once mixed they form a highly durable frequently utilized composite material that is a cornerstone in building and construction
·of machine made sand concrete to a certain extent At present there are more studies at home and abroad on the influence of stone powder content on concrete properties [12 14]
·Machine made sand self produced high quality machine made sand was produced by the parent rock of Pingkan tun nel excavation The compressive strength of the parent rock was 102 MPa the apparent density was 2723 kg/m 3 and the moisture content was % The crushing index of machine made sand was 18% the methylene blue value was g/
·Using the ingredients of normal concrete the SCC is produced Cementitious materials are adopted for replacing the SCC cement content using agricultural products and industrial waste materials For optimizing the material contained in SCC to obtain effective performance many machine learning approaches are implemented
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