Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Low-shrinkage anti-cracking ultra-high performance concrete and preparation method thereof
The invention relates to the technical field of concrete preparation, in particular to low-shrinkage anti-cracking ultra-high performance concrete and a preparation method thereof.The low-shrinkage anti-cracking ultra-high performance concrete is prepared from, by mass, 35-37 parts of cement, 8-9 parts of rice hull ash, 44-45 parts of sand, 8-11 parts of water and the balance water reducing agent; by adding the rice hull ash which can play an internal curing role, the concrete has 28-day compressive strength of 160-168 MPa and 14-day minimum self-constriction of 60 micro-strains, the early self-constriction of the ultrahigh-strength concrete is effectively reduced, the early cracking risk of the ultrahigh-strength concrete is reduced, and compared with SAP, the average grain size of the rice hull ash is small, so that the concrete has the advantages that the average grain size of the rice hull ash is small, and the service life of the concrete is prolonged. And the expansion caused by water absorption is avoided, so that larger holes are not left in the concrete, and the negative influence on the long-term durability of the concrete is avoided.
本发明涉及混凝土制备技术领域，具体为一种低缩抗裂的超高性能混凝土及其制备方法，包括以下质量份成分：水泥35～37份，稻壳灰8～9份，砂44～45份，水8～11份，余量为减水剂；本发明通过添加稻壳灰这种能够起到内养护作用的材料，使得混凝土具有了160‑168MPa的28天抗压强度和14天60个微应变的极小自收缩，有效的减少了超高强混凝土的早期自收缩，降低了其早期开裂风险，相较于SAP，由于稻壳灰平均粒径较小，并且不会因为吸水而膨胀，故不会在混凝土内部留下较大孔洞，对于混凝土长期耐久性能不会有负面影响。
Low-shrinkage anti-cracking ultra-high performance concrete and preparation method thereof
The invention relates to the technical field of concrete preparation, in particular to low-shrinkage anti-cracking ultra-high performance concrete and a preparation method thereof.The low-shrinkage anti-cracking ultra-high performance concrete is prepared from, by mass, 35-37 parts of cement, 8-9 parts of rice hull ash, 44-45 parts of sand, 8-11 parts of water and the balance water reducing agent; by adding the rice hull ash which can play an internal curing role, the concrete has 28-day compressive strength of 160-168 MPa and 14-day minimum self-constriction of 60 micro-strains, the early self-constriction of the ultrahigh-strength concrete is effectively reduced, the early cracking risk of the ultrahigh-strength concrete is reduced, and compared with SAP, the average grain size of the rice hull ash is small, so that the concrete has the advantages that the average grain size of the rice hull ash is small, and the service life of the concrete is prolonged. And the expansion caused by water absorption is avoided, so that larger holes are not left in the concrete, and the negative influence on the long-term durability of the concrete is avoided.
本发明涉及混凝土制备技术领域，具体为一种低缩抗裂的超高性能混凝土及其制备方法，包括以下质量份成分：水泥35～37份，稻壳灰8～9份，砂44～45份，水8～11份，余量为减水剂；本发明通过添加稻壳灰这种能够起到内养护作用的材料，使得混凝土具有了160‑168MPa的28天抗压强度和14天60个微应变的极小自收缩，有效的减少了超高强混凝土的早期自收缩，降低了其早期开裂风险，相较于SAP，由于稻壳灰平均粒径较小，并且不会因为吸水而膨胀，故不会在混凝土内部留下较大孔洞，对于混凝土长期耐久性能不会有负面影响。
Low-shrinkage anti-cracking ultra-high performance concrete and preparation method thereof
一种低缩抗裂的超高性能混凝土及其制备方法
HUANG HAO (Autor:in) / ZENG XIANGJIE (Autor:in) / LI JINCAN (Autor:in) / LU YANI (Autor:in) / FAN YAOZHOU (Autor:in) / LI DONGFEI (Autor:in) / ZHU MINGYU (Autor:in) / XIONG ZHEYI (Autor:in)
22.10.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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