植物纤维增强型EPS陶粒混凝土配合比设计

为改善陶粒混凝土和易性差、脆性大等缺点，采用正交试验设计方法，考虑棉花秸秆纤维、ＥＰＳ、 水泥及砂率在三水平的影响下，配制植物纤维增强型ＥＰＳ陶粒混凝土试块。对试块的抗压及劈裂抗拉 强度进行极差和方差分析，确定满足一定考察指标的材料最优组合。结果表明:ＥＰＳ颗粒掺量是影响试 块抗压强度的最显著因素；棉花秸秆纤维能显著提高陶粒混凝土试块的抗劈拉强度，延缓混凝土开裂。 最终确定水泥掺量４０％、ＥＰＳ颗粒掺量０．４５％、棉花秸秆纤维掺量１．０％、砂率２．５％时抗压强度在８．０ ＭＰａ～１０．０ＭＰａ范围内为各种因素的最优组合。

Plant Fiber-reinforced EPS Ceramsite Concrete Mixture Ratio Design

In order to improve the workability ,overcome the brittleness and other defects of ceramic concrete ,the orthog-onal experiment design method was adopted .Considering EPS ,plant fiber and cement sand ratio under the influence of four factors at three levels were considered to make plant fiber-reinforced EPS ceramsite concrete blocks .Based on the material compressive strength and splitting tensile strength ,range analysis and variance analyses were performed to deter-mine the optimal mixture ratio which meets a certain inspection index of the material .The results showed that EPS is the main and the most significant factor that influences compressive strength .Plant fiber can effectively improve crack resis-tance and tensile strength of concrete .The results suggest that the cement content of 40% ,EPS content of 0 .45% ,cot-ton stalk fiber content of 1 .0% sand rate 2 .5% is the optimal combination of various factors which compressive strength within the scope of 8 .0 to 10 .0 MPa .