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混凝土路面的常见裂缝与防治措施.rar

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混凝土路面的常见裂缝与防治措施

水泥混凝土路面经常出现裂缝，有些路面还是使用高品质的商品混凝土之后出现了裂缝 ，不光外观难看，甚至影响使用性能，不得不把混凝土板块打掉重来，造成不必要的材料浪费和经济损失，还会引发商品混凝土供应企业与施工企业之间的经济纠纷。因此，本文试图就混凝土路面常见的几种裂缝进行分析、找出原因、设法防治。
1、龟　裂
1.1　成　因
混凝土路面龟裂亦称塑性收缩裂缝，是指混凝土浇注后仍处于塑性状态时，由于表面水分蒸发过快而产生的裂缝。这类裂缝缝隙多在表面出现，形成不规则长短宽窄不一，呈龟裂状，肉眼可见，深度一般不超过50mm，这种裂缝对结构性能影响不大，但外观难看。产生的原因 主要是混凝土浇注完毕后表面没有及时覆盖，特别是在炎热或大风天气混凝土表面水分蒸发过快，或者是被基础吸水过快等原因，造成混凝土产生急剧收缩，此时混凝土强度趋近于零 ，不能抵抗这种变形应力而导致开裂。商品混凝土由于为了满足可泵性、流动性，出机时混凝土的塌落度和砂率比普通混凝土大很多，如道路混凝土施工塌落度规范为2．5cm，实际往
Common cracks in concrete pavement and prevention measures

Cement concrete pavement cracks often, and some pavement or concrete using the high quality of goods after the cracks appeared, not only looks ugly, and even affect the performance, had to concrete blocks smashed over again, resulting in unnecessary waste of material and economic losses, will lead to construction of mixed concrete supply business and economic disputes between enterprises. Therefore, this paper attempts to concrete pavement analysis of several common cracks, find out why, try to control. 
1, crack turtle
1.1 as a result of
Also known as plastic shrinkage cracking of concrete road surface crack, is the pouring of concrete in a plastic state after, due to rapid evaporation of surface water caused by the cracks. Many of these cracks in the surface cracks, the development of irregular length varies in width, was cracked like to the naked eye can see, the depth of not more than 50mm, this crack has little influence on the structure, but look ugly. The main cause is the pouring of concrete cover after the surface is not timely, especially in hot or windy weather, evaporation of water from the concrete surface too fast, or too fast to be based on such factors as water absorption, resulting in a drastic shrinkage of concrete, this time closer to concrete strength to zero, can not resist the deformation stress caused by cracking. Goods can pump concrete as to meet, liquidity, the machine slump concrete and sand much larger rate than ordinary concrete, such as road construction slump concrete norms of 2.5cm, the actual to
 

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