晶体生长条件对水化硅酸钙微结构与力学性能影响研究
关键词 养护制度 RPC混凝土 力学性能
毕业论文设计说明书外文摘要
Title Effect of crystal growth conditions on Microstructure and
mechanical properties of hydrated calcium silicate
Abstract
Reactive Powder Concrete，short as RPC，is a kind of new concrete material. Compared with normal concrete，it has the characteristics of high strength, high toughness, high durability and high temperature adaptability etc.The influence of three curing schedules, which are standard curing, hot water curing (90 ℃) and high temperature curing (200℃), on the strength of RPC concrete is studied.The effect of hydrothermal time on the mechanical properties of RPC is studied at 200 ℃.The characteristics of the three point bending strength, compressive strength, elastic modulus, shrinkage and so on are tested.The results of XRD show that the characteristic peaks of C2S and C3S are still existed after 200 ℃ curing for 96 hours , but the intensity of the diffraction peaks is weak.Prolong the time of steam pressure curing is favorable to the compressive strength of RPC concrete.
Keywords Curing schedule Reactive powder concrete(RPC) Mechanical property
目 次 I
1 绪论 1
1.1 选题背景及意义 1
1.2 国内外现状 1
1.3 研究内容 2
2 实验 3
2.1 原料及性能 3
2.1.1 水泥 3
2.1.2 硅灰 3
2.1.3 石英砂 3
2.1.4 石英粉 3
2.1.5 钢纤文 4
2.1.6 高效减水剂 4
2.1.7 A1-80钢纤末 4
2.1.8 拌合水 5
2.2 实验设备 5
3 钢纤末对混凝土(RPC)力学性能的影响 6
3.1 RPC实验配合比 6
3.2 试件成型与养护 7
3.3 试验方法 7
3.4 实验结果及分析 8
3.4.1 钢纤末掺量对RPC抗弯抗压强度的影响 8
3.4.2 钢纤末掺量对RPC动弹模量的影响 9
4 热养护制度对活性粉末混凝土力学性能的影响 11
4.1 配合比、试件制作与养护 11
4.2 试验方法 12
4.3 实验结果及分析 12
5 热养护制度对冷等静压试件结构的影响 18
5.1 配合比 18
5.2 试件制作及养护 18
5.3 试验方法 20
5.4 实验结果及分析 21
5.5 XRD 25
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