A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Prefabricated concrete component and preparation method thereof
The invention belongs to the technical field of building material engineering, and particularly relates to a precast concrete component and a preparation method thereof. The preparation method comprises the following steps: 1) preparing a mold, and paving a first plastic film at the bottom of the mold; (2) delayed coagulation neat paste is injected into the mold paved with the first plastic film, and the delayed coagulation neat paste contains water, a cementing material and a retarder and does not contain aggregate; (3) paving a second plastic film on the surface of the delayed coagulation neat paste after the delayed coagulation neat paste is uniformly and flatly paved in the mold; and 4) injecting concrete into the mold paved with the second plastic film, further curing, and demolding to obtain the concrete. According to the present invention, by significantly reducing the constraint of the cement-based material and the mold, the shrinkage cracking risk during the concrete prefabricated member preparation process is substantially reduced, the theoretical anti-cracking index K is in the probabilistic cracking interval or the non-cracking interval, and the test result shows that the prepared concrete prefabricated member does not crack.
本发明属于建筑材料工程技术领域，具体涉及一种混凝土预制构件及其制备方法。该制备方法包括以下步骤：1)准备模具，并在所述模具的底部铺第一塑料膜；2)向铺有第一塑料膜的模具内注入缓凝净浆，所述缓凝净浆中包含水、胶凝材料和缓凝剂，不包含集料；3)待缓凝净浆均匀平铺在模具内后，在缓凝净浆的表面铺第二塑料膜；4)向铺有第二塑料膜的模具内注入混凝土，进一步养护、脱模，即得。本发明通过显著减小水泥基材料与模具的约束，大幅降低了制备混凝土预制构件过程中出现的收缩开裂风险，理论抗裂指数K处于概率开裂区间或不开裂区间，试验测试结果也显示制备所得混凝土制构件未开裂。
Prefabricated concrete component and preparation method thereof
The invention belongs to the technical field of building material engineering, and particularly relates to a precast concrete component and a preparation method thereof. The preparation method comprises the following steps: 1) preparing a mold, and paving a first plastic film at the bottom of the mold; (2) delayed coagulation neat paste is injected into the mold paved with the first plastic film, and the delayed coagulation neat paste contains water, a cementing material and a retarder and does not contain aggregate; (3) paving a second plastic film on the surface of the delayed coagulation neat paste after the delayed coagulation neat paste is uniformly and flatly paved in the mold; and 4) injecting concrete into the mold paved with the second plastic film, further curing, and demolding to obtain the concrete. According to the present invention, by significantly reducing the constraint of the cement-based material and the mold, the shrinkage cracking risk during the concrete prefabricated member preparation process is substantially reduced, the theoretical anti-cracking index K is in the probabilistic cracking interval or the non-cracking interval, and the test result shows that the prepared concrete prefabricated member does not crack.
本发明属于建筑材料工程技术领域，具体涉及一种混凝土预制构件及其制备方法。该制备方法包括以下步骤：1)准备模具，并在所述模具的底部铺第一塑料膜；2)向铺有第一塑料膜的模具内注入缓凝净浆，所述缓凝净浆中包含水、胶凝材料和缓凝剂，不包含集料；3)待缓凝净浆均匀平铺在模具内后，在缓凝净浆的表面铺第二塑料膜；4)向铺有第二塑料膜的模具内注入混凝土，进一步养护、脱模，即得。本发明通过显著减小水泥基材料与模具的约束，大幅降低了制备混凝土预制构件过程中出现的收缩开裂风险，理论抗裂指数K处于概率开裂区间或不开裂区间，试验测试结果也显示制备所得混凝土制构件未开裂。
Prefabricated concrete component and preparation method thereof
一种混凝土预制构件及其制备方法
TANG LIANG (author) / WANG QIONGQIONG (author) / LI GUOYOU (author) / ZHANG FASHENG (author) / HUO LIANG (author) / WANG QINGXUAN (author)
2024-11-22
Patent
Electronic Resource
Chinese
IPC:
B28B
Formgeben von Ton oder anderen keramischen Stoffzusammensetzungen, Schlacke oder von Mischungen, die zementartiges Material enthalten, z.B. Putzmörtel
,
SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
/
C04B
Kalk
,
LIME
/
E04C
STRUCTURAL ELEMENTS
,
Bauelemente
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