混凝土早龄期的抗压强度与弹性模量的历时变化模型

第一篇范文：浅谈混凝土早龄期性能与裂缝控制

论文题目 浅谈混凝土早龄期性能与裂缝控制 __

学生姓名

学 号

指导教师

专 业

年 级

学 校

目 录

一、概述 ····························································································· 1

（一）问题的提出 ············································································ 1

（二）主要内容 ··············································································· 2

三、混凝土早龄期性能研究 ····································································· 2

（一）混凝土初期水化与电特性 ························································· 2

（二）混凝土早期水化放热································································ 3

（三）混凝土早龄期收缩与徐变 ························································· 3

三、混凝土裂缝类型及成因 ····································································· 4

（一）混凝土裂缝类型 ······································································ 4

1.塑性收缩裂缝 ··············································································· 4

2.混凝土干缩引起的裂缝 ··································································· 4

3.温度变化裂缝 ··············································································· 5

4.结构基础不均匀沉降裂缝 ································································ 6

5.荷载作用裂缝 ··············································································· 6

（二）混凝土裂缝的成因 ··································································· 6

1.材料因素 ····················································································· 6

2.施工因素 ····················································································· 6

3.设计因素 ····················································································· 7

4.外界因素 ····················································································· 7

四、钢筋混凝土结构裂缝预防措施 ···························································· 8

（一）材料措施 ··············································································· 8

1.材料选用 ····················································································· 8

2.配料 ···························································································· 9

3.配筋 ···························································································· 9

（二）施工措施 ··············································································· 9

1.混凝土浇筑 ·················································································· 9

2.模板工程 ··················································································· 10

3.设计措施 ··················································································· 10