混凝土裂缝特征、原因分析及防措施毕业设计.docVIP

摘 要 混凝土是一种由沙石骨料、水泥、水及其他材料混合而形成的非均质脆性材料。由于混凝土施工和本身变形、约束等一系列问题，硬化成型的混凝土中有着众多的微孔隙、气穴和微裂缝，正是这些初始缺陷的存在，才使混凝土呈现出一些非均质的特性。微裂缝通常是一种无害裂缝对混凝土的承重、防渗及其他一些使用功能不产生危害，但是在混凝土受到荷载、温差等作用之后，微裂缝就会不断扩展通，最终形成我们肉眼可见的宏观裂缝，即混凝土工程常说的裂缝。随着城市建设的飞速发展和住宅改革制度的不断深入，用户对房屋环境和质量要求越来越高，建筑物(住宅)裂缝问题反映强烈，在当前施工中如何克服混凝土裂缝是一件非常重要的事，本文将对混凝土裂缝的原因及危害,?混凝土裂缝的防治,从混凝土裂缝的种类入手，提出混凝土裂缝的危害,对混凝土裂缝成因进行分析，并对如何防治混凝土裂缝谈一些粗浅的见解。? ? 关键词：混凝土；裂缝；特征；原因分析；防治措施。 Abstract Heterogeneous brittle material, concrete is a kind of sand gravel aggregate,cement, water and other materials produced by mixing. Due to a series ofproblems in concrete construction and its deformation, constraints, there are numerous micropores, cavitation and micro cracks in concrete hardeningmolding, it is these initial defects, makes concrete exhibits someheterogeneous characteristics. The micro crack is a kind of harmless crack on concrete load-bearing, seepage and other functions to do no harm, but byload, temperature difference in concrete, micro cracks will continue to expand,eventually we visible to the macro crack, namely mixed crack concrete engineering often say. With the rapid development of city construction and housing system reform unceasingly thorough, the user more on housingenvironment and quality requirements, building (residential) crack problemsreflect the strong, how to overcome in the current construction of concrete crack is a very important matter, the reason and harm of concrete crackprevention of concrete cracks, , starting from the types of concrete cracks, thehazards of concrete cracks, the causes of concrete cracks are analyzed, and talk about some superficial views on how to prevent concrete crack. Keywords: concrete; crack; characteristic; cause analysis; prevention measures. 目 录 目 录1 第一章 前 言2 第二章 产生裂缝的主要原因有以下几方面 2.1 水泥水化热 2 2.2 外界气温变化2 2.3混凝土的收缩3 第三章 裂缝的控制方法 3.1优选原材料4 3.2 采用合理的施工方法4 3.2.1 工程试验4 3.2.2温度控制4 3.2.3 混凝土浇注、拆模5 3.2.4 做好表面隔热保护5 3.2.5 混泥土浇筑后的养护6 第四章 混凝土裂缝处理措施? 4.1.表面修补法6 4.2.灌浆、嵌逢封堵法7 4.3.结