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A platform for research: civil engineering, architecture and urbanism
Method for preventing temperature cracks of layered pouring concrete
The invention discloses a method for preventing temperature cracks of layered pouring concrete, which comprises the following steps: step S1, pouring a layer of super-retarding self-leveling mortar on lower layer concrete, the super-retarding self-leveling mortar comprising a super-retarding water reducing agent; s2, after the super-retarding self-leveling mortar is leveled, upper-layer concrete with the thickness smaller than or equal to 20 cm is poured on the super-retarding self-leveling mortar, and the upper-layer concrete is compacted through vibration; s3, top-layer concrete continues to be poured on the upper-layer concrete according to the layering thickness larger than or equal to 30 cm and smaller than or equal to 50 cm, and the top-layer concrete is compacted through vibration; and S4, after 48 hours to 72 hours, mold removal and maintenance are conducted. The super-retarding self-leveling mortar greatly weakens the tensile stress of concrete caused by shrinkage due to temperature drop, so that temperature cracks generated by pouring concrete on the upper layer are avoided.
本发明公开了一种防止分层浇筑混凝土温度裂缝的方法，包括以下步骤：步骤S1，在下层混凝土之上浇筑一层超缓凝自流平砂浆，所述超缓凝自流平砂浆包括超缓凝型减水剂；步骤S2，待所述超缓凝自流平砂浆流平后，在所述超缓凝自流平砂浆之上浇筑小于等于20厘米厚度的上层混凝土，并将所述上层混凝土振实；步骤S3，在所述上层混凝土之上再按照大于等于30厘米且小于等于50厘米的分层厚度继续浇筑顶层混凝土，并将所述顶层混凝土振实；步骤S4，待48小时至72小时后进行拆模和养护。该超缓凝自流平砂浆大大削弱了混凝土因温降收缩产生的拉应力，从而避免了上层浇筑混凝土产生温度裂缝。
Method for preventing temperature cracks of layered pouring concrete
The invention discloses a method for preventing temperature cracks of layered pouring concrete, which comprises the following steps: step S1, pouring a layer of super-retarding self-leveling mortar on lower layer concrete, the super-retarding self-leveling mortar comprising a super-retarding water reducing agent; s2, after the super-retarding self-leveling mortar is leveled, upper-layer concrete with the thickness smaller than or equal to 20 cm is poured on the super-retarding self-leveling mortar, and the upper-layer concrete is compacted through vibration; s3, top-layer concrete continues to be poured on the upper-layer concrete according to the layering thickness larger than or equal to 30 cm and smaller than or equal to 50 cm, and the top-layer concrete is compacted through vibration; and S4, after 48 hours to 72 hours, mold removal and maintenance are conducted. The super-retarding self-leveling mortar greatly weakens the tensile stress of concrete caused by shrinkage due to temperature drop, so that temperature cracks generated by pouring concrete on the upper layer are avoided.
本发明公开了一种防止分层浇筑混凝土温度裂缝的方法，包括以下步骤：步骤S1，在下层混凝土之上浇筑一层超缓凝自流平砂浆，所述超缓凝自流平砂浆包括超缓凝型减水剂；步骤S2，待所述超缓凝自流平砂浆流平后，在所述超缓凝自流平砂浆之上浇筑小于等于20厘米厚度的上层混凝土，并将所述上层混凝土振实；步骤S3，在所述上层混凝土之上再按照大于等于30厘米且小于等于50厘米的分层厚度继续浇筑顶层混凝土，并将所述顶层混凝土振实；步骤S4，待48小时至72小时后进行拆模和养护。该超缓凝自流平砂浆大大削弱了混凝土因温降收缩产生的拉应力，从而避免了上层浇筑混凝土产生温度裂缝。
Method for preventing temperature cracks of layered pouring concrete
一种防止分层浇筑混凝土温度裂缝的方法
YU FANG (author) / WU ZHANGBIAO (author) / DENG CHUNLIN (author) / XIONG JIANBO (author) / LI PENGPING (author) / LI KAI (author) / WANG YINGNING (author) / LI AN (author) / YU ZHIPENG (author) / XU YANPING (author)
2023-06-23
Patent
Electronic Resource
Chinese
IPC:
E04G
SCAFFOLDING
,
Baugerüste