大體積砼的蓄熱養護方案.doc

大體積砼的蓄熱養護

    大體積砼的養護是防止砼出現裂縫的關鍵工作，必須高度重視。實踐證明，蓄熱法養護是大體積砼養護行之有效的方法。本工程結合砼的測溫，采用塑料薄膜-草袋覆蓋的養護方法。
    (1) 在砼澆筑后的1～3天，由于水泥水化熱作用， 砼是處在升溫階段。因此如施工期間氣溫較高， 則可適當推遲覆蓋時間。因為過早的保溫不利于熱量的散發，只會提高砼內部的最高溫度，增加地基對基礎的約束力，對防止深層裂縫不利。所以如在氣溫較高的季節施工，在開始可僅采用適當覆蓋遮陽，澆水潤濕，以免發生龜裂。
    (2) 如砼澆筑時氣溫較低，則必須及時
Regenerator of conservation of mass concrete

    Conservation of mass concrete is the key to prevent the concrete cracks, we must attach great importance. Practice shows that regenerative method of mass conservation is an effective method of curing concrete. The project combines the temperature of concrete, plastic film - straw bags covering conservation methods.
    (1) Pouring 1 to 3 days after, as the role of hydration heat of cement, concrete is in a warming phase. So, if the temperature is high during the construction period, coverage may be appropriate to defer the time. Because the insulation is not conducive to premature heat, will raise the maximum temperature of concrete inside to increase the foundation on the basis of the binding, deep cracks to prevent negative. So if the higher temperature construction can begin only with adequate coverage of shade, water wet to avoid cracking.
    (2) If the temperature is lower when Pouring, you must promptly
 

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