The Development And Application Of An Ecological Thermal Insulation Material Made By Cotton-straw And Polystyrene Grain

Beginning from building energy efficiency and the re-utilization of wastes, this paper aims to manufacture a new building material which is met the required of the cast-in-place maintenance wall in the collectivized settlement project--“warm-fold”(compressive strength is greater than 3.5 MPa, the flexural strength is greater than 1.2 MPa, softening coefficient is greater than 0.65).The material is compounding with the polystyrene grain belongs to the industrial by-product and cotton-stalk came from the agricultural wastes, cement as the cementing materials, slags as the skeletal materials. The performances of this material are focus on compressible strength and flexural strength, self-insulation to some certain and the better resistant performance to sulfate attack.Based on the experimental study, the briquette physic-mechanical performance’s impact from the different addition amounts among cement, steel slag,slag, cotton stalks and the polystyrene grain. The paper mainly studies in the following aspects:(1)Respectively for cement and steel slag, cement and slag, cement and steel slag and slag mixture proportion of indoor experiments. Combining research topics, in meet the mechanics performance index,the maximum dosage of steel slag(mine) and thermal insulation performance as the prerequisite, on the basis of analysis of test data, to determine the selection of 40% the amount of cement and steel composite cement, slag the amount of 60%; Selection when the composite cement and slag cement dosage is 50%,slag dosage is 50%; cement and steel slag and slag cement compound selected for 40%, 20% of the amount of slag, slag amount of 40%.(2)In cement and steel slag, cement and slag, cement and steel slag and slag mixture, on the basis of the mixing ratio of cement, with steel slag(mine) and mixture respectively add experimental study of proportion of cotton stalks, polystyrene particles. Through the analysis of test results,the optimum content of 3% of cotton stalks, polystyrene particles best content is 1.2%.(3)Preliminary selection applies to nomads settlement project “warm circle” cast enclosure retaining wall block materials for thermal test and resistance to sulfate erosion test, finally confirmed one of the most suitable for nomads settlement project “warm circle” cast enclosure retaining wall material mixture ratio, at the same time of cement-based cotton straw polystyrene particles steel slag(slag) compound ecological insulation materials cast enclosure wall construction technology and construction quality control are introduced.Through research papers on the one hand, for industry, building material utilization and comprehensive utilization of agricultural waste to provide effective way, on the other hand to provide agriculture herdsman “warm circle” to build a new thermal insulation material of popularization and application to provide theoretical basis and technical guidance, to compound the thermal-insulating blocks become industrial and civil buildings in a broader range of heat retaining wall provides some references for the application promotion.