Papers by Keyword: Mixing Proportion

Abstract: This paper comparatively study on fluidity, flexural strength, compressive strength and other mechanical properties of sisal fiber cement mortar and the base mortar. The results show that fluidity of sisal fiber makes sisal fiber cement mortar than that of the base group decreased about by 11.1%;When sisal fiber content is 4.5 kg/m³, water reducing agent is 2.78 kg/m³, the best mixing proportion of sisal fiber cement mortar for water: glue: sand = 0.45:1.:2.5, flexural strength improved by 52.4%, 54.3%, 20.1% respectively, compressive strength increased by-1.5%, 6.5% and-2.1%.And analyzed the mechanism of flexural and compressive from the chemistry of sisal fiber and cement.

Abstract: According to the principle of Preparation about Reactive powder concrete (RPC),selection of local raw materials,the use of orthogonal experimental design method,carried out research of RPC mixing proportion design. Finally get the RPC optimal mix of meeting engineering requirement. By the range analysis and variance analysis of the test data of mix,obtained the influence law about water-cement ratio,steel fiber content, sand type,curing regime on compressive strength and splitting tensile strength .

Abstract: By the laboratory tests of mixing proportion, this paper contrastively analyzes the consolidation instances of silt with HEC, HAS and cement, also emphatically discusses the influence regularities of the unconfined compression strength of solidified silt with the following factors such as the dose of consolidators and the curing time, which provide reliable data for situ tests. According to the test results in site, the optimum mixing proportion for consolidator-mixed pile is HAS with 12% dose. The result can be used as reference for the optimum mixing proportion design of consolidator-mixed pile composite foundation.

Abstract: C25 self-compacting concrete which meets the requirement of workability and strength grade is maked up by selecting local raw materials, using reasonable compound admixtures, based on c25 self-compacting concrete preliminary mixing proportion. we try to pursue an economical mixing ratio of the Low-strength Self-compacting Concrete which can adapt to the characteristics of the region's raw materials. The purpose is to promote the application of self-compacting concrete in region.

Abstract: In order to study the mechanical performance of Reactive Powder Concrete (RPC) used for structure engineering, 38 series of RPC specimens are fabricated, cured, tested and analyzed. There are 5 sets of specimens are fabricated for each actual site structure engineering. The compressive strength, flexural strength and elastic modulus are tested according to the specimens and the compressive strength is tested with different age time. All the specimens are steam cured with the same situation as the structure. According to the test result, the compressive strength of RPC is up to 80MPa 3days after it is cast and the compressive strength is higher than 120MPa 15days later. The average flexural strength of RPC is 19.4MPa and the elastic modulus is 45.15GPa. The tested results show that the mechanical performance of RPC can satisfy the engineering requirement. The mixing proportion and the curing system can be used for engineering design and construction.