【作者】 王鹏；

【导师】 杨伟军；

【作者基本信息】 长沙理工大学 ， 结构工程， 2008， 硕士

【摘要】 在提倡建筑节能的21世纪,轻骨料混凝土由于具有轻质的特点和保温隔热等性能,正从非承重结构开始应用到承重结构。由于骨料的不同,轻骨料混凝土的性能也各不相同,本文利用长沙本地页岩陶粒,配制出结构陶粒混凝土,并对与抗压强度有关的各种性能进行了试验研究。本文首先对陶粒性能进行试验,根据试验结果和正交试验方法配制出抗压强度在20MPa～40MPa的结构陶粒混凝土,并通过对试验过程的观察和分析找到了有利于施工,防止陶粒上浮的养护方法。通过检验发现基准配合比符合强度、施工高性能和保温性能的要求,并找出陶粒堆积密度与强度、混凝土干表观密度与导热系数的关系。然后对对抗压强度进行统计分析,对两种抗压强度关系进行试验研究。并对龄期强度和尺寸效应两大特征进行了试验研究。龄期强度的研究主要针对早龄期与强度、及早期强度推算28d强度两方面,试验结果表明陶粒混凝土和普通混凝土关于龄期强度的经验公式有所不同,并给出推荐公式。尺寸效应主要以换算系数作为研究对象,建议使用修正公式,并结合经典理论对陶粒混凝土的尺寸效应进行分析。对陶粒混凝土劈裂抗拉强度与立方体抗压强度关系进行试验研究并探讨劈裂抗拉强度对钢筋陶粒混凝土粘结性能的影响。通过应力应变关系、弹性模量和泊松比三种主要变形性能的研究,给出变形性能相关参数和建议取值,为进一步的研究和工程应用提供依据。更多还原

【Abstract】 In the 21st century of advocating energy-saving in buildings,lightweight aggregate concrete (LWAC) develops to load-bearing structure from non-load-bearing structure because of its characteristics of high-strength and light-weight and performance such as thermal insulation. Since aggregate is different ,LWAC performs differently.The thesis confected structural LWAC used the local shale ceramisite in Changsha and reseached on many performance which surrounded cubic compressive strength.First of all tested the ceramisite.According to the result and orthorhombic experimentation,the thesis confected structural ceramisite concrete which cubic compressive strength was in 20MPa～40MPa and found maintaince way avoided ceramisite floating through observing the process. Statistics parameters was found by their research and could be reference of the standard and designed value.Then it researched age-strength and size iffect. In age-strength, the relation of time and strength ,and calculation of 28d strength were researched chiefly. The result indicated there were differences between ceramisite concrete and common concrete,and gave recommendatory formula. In size effect,coefficient was the main object, and gave amendatory formula and analysed size effect by classical theories.The thesis researched conversion relation include compressive strength and bulk density of ceramisite and splitting-tensile strength and axial compressive strength, density of concrete and coefficient of conductivity,and research on stress and strain,and modulus of elastic. The thesis gave all the conversion coefficient and parameter of deformation performance. The data can provide a basis for farther research and application on engineering.更多还原