两种密度棉花秸秆草砖在不同受压方式下的力学性能试验研究  

Study on Mechanical Properties Experiments of Different Density Cotton Straw Brick in Different Compression Ways

作　　者：付彬彬[1] 冯勇[1] 晋强[1] 史阳光 

机构地区：[1]新疆农业大学水利与土木工程学院,乌鲁木齐830052

出　　处：《新疆农业大学学报》2014年第3期236-239,共4页Journal of Xinjiang Agricultural University

基　　金：国家自然科学基金项目(51268056);新疆水利水电重点学科基金(XJZDXKSLSD2012-13)

摘　　要：采用微机控制电子万能试验机对密度分别为187.5 kg/m3和250.0 kg/m3的棉花秸秆草砖进行横压、侧压和竖压,并通过荷载与位移的关系曲线,得到应力与应变的发展趋势,研究棉秆草砖的承载力、极限抗压强度和弹性模量变化。结果表明,在同尺寸同密度的条件下棉花秸秆草砖的力学性能与其压缩方式有关,竖压方式下棉花秸秆草砖的承载力较大,其中在失效点处竖压的极限抗压强度和弹性模量的数值最大;在密度不同时,高密度草砖的承载力、极限抗压强度和弹性模量均大于低密度草砖。To study the mechanical properties of cotton straw brick which were related to the density and compression ways,which were tested by using microcomputer control electroGuniversal testing machine, and the mechanical properties of density about 187.5 kg/m3 and 250.0 kg/m3 cotton straw bricks were obG tained by different test ways.According to the straw brick vertical stress and displacement relationship curves and the development law of the stress and strain,the bearing capacity,ultimate uniaxial compressive strength and elastic modulus can be determined.Test results showed that under the condition of the same size and density,its mechanical properties were related to the compression ways,and the vertical pressure of the ultimate compressive strength,elastic modulus value were maximum at the failure point.If the densiG ty was different,the ultimate compressive strength and elastic modulus and bearing capacity of the high density of straw brick were greater than low density straw brick.

关 键 词：棉花秸秆草砖 压力与位移 不同压制方式 极限抗压强度 弹性模量 

分 类 号：TU522.1[建筑科学—建筑技术科学]