探討的施工振搗不密實(shí)導(dǎo)致混凝土滲水問題-閱讀頁
2025-01-29 00:49本頁面
【正文】 ent for construction. 施工因素 the construction factors ?、佼?dāng)混凝土內(nèi)外最大溫差小于25℃時(shí)，混凝土就不會(huì)產(chǎn)生表面裂縫。1) when the concrete is less than 25 ℃, the maximum temperature difference inside and outside surface cracks in concrete are not produced. So to make a good record of temperature measurement, in order to grasp the actual changes in the temperature field. ②抗?jié)B混凝土用的水泥，但應(yīng)注意延長攪拌時(shí)間。(3) strict control sand silt content, and through carefully graded, improve the tensile strength of concrete. ?、芑A(chǔ)底板和圍護(hù)墻可采用240～370mm厚的磚模，混凝土澆筑后，磚模不拆即回填土。t dismantle the backfill soil. ?、莼A(chǔ)底板采用預(yù)應(yīng)力混凝土，利用預(yù)應(yīng)力筋張拉后的彈性回縮，消除結(jié)構(gòu)裂縫。6. Prevent cement must use the same varieties of cement concrete. ?、呋炷敛捎梅謱訚仓?。Today to strengthen mercial concrete onsite monitoring strength detection of concrete slump and mixing time. ⑨防水混凝土及補(bǔ)償收縮混凝土的養(yǎng)護(hù)，嚴(yán)重影響結(jié)構(gòu)的抗?jié)B性，特別是早期養(yǎng)護(hù)更為敏感。A. waterproof concrete and hea pensation shrinkage concrete after the final set (4 ~ 6 h after casting), should be covered immediately double hulls or sack of maintenance. ，容易產(chǎn)生溫度裂縫，降低混凝土的抗?jié)B性。C. should not be using steam curing, led to the decrease of the permeability resistance of concrete structure. ，避免混凝土表面裂縫。E. winter construction, cement preheating method can be used raw materials of concrete, the concrete of the temperature of the machine should not be greater than 35 ℃. 。F. waterproof concrete winter appropriate USES heat storage method of curing. When greenhouses curing method is used, the relative should maintain a certain humidity, prevent concrete early dehydration.
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