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A platform for research: civil engineering, architecture and urbanism
Composite mineral admixture and concrete
The invention relates to the technical field of concrete admixtures, and particularly discloses a composite mineral admixture and concrete. The composite mineral admixture comprises 0.2-1 part of a plastic expanding agent, 5-15 parts of an internal curing agent, 10-20 parts of organic fibers, 100-150 parts of silica fume and 800-900 parts of fly ash. Wherein the apparent density of the plastic expanding agent is 300-600 g/L; wherein the water absorption capacity of the internal curing agent is greater than 500g/g. The composite mineral admixture obtained in the invention is mixed with cement, fine aggregate, coarse aggregate and the like to prepare concrete. According to the present invention, the obtained concrete has characteristics of high expansion rate, high splitting tensile strength, high freeze-thaw resistance and low shrinkage rate, detection results show that the 3 h vertical expansion rate of the concrete is more than 0.52%, the 28 d shrinkage rate is more than-0.17%, the 28 d splitting tensile strength is more than 3.7, and the weight loss rate is less than 3.15% after 100 times of freeze-thaw experiments.
本申请涉及混凝土外加剂技术领域，具体公开了一种复合矿物掺合料及混凝土。所述复合矿物掺合料，包括塑性膨胀剂0.2‑1份、内养护剂5‑15份、有机纤维10‑20份、硅灰100‑150份、粉煤灰800‑900份；其中塑性膨胀剂的表观密度为300‑600g/L；其中内养护剂的吸水倍数大于500g/g。将本申请所得复合矿物掺合料与水泥、细骨料、粗骨料等进行混合，制得混凝土。所得混凝土具有较高的膨胀率、劈拉强度和冻融耐受性，以及较低的收缩率，经检测，混凝土的3h竖向膨胀率在0.52%以上，28d收缩率在‑0.17%以上，28d劈拉强度在3.7以上，100次冻融实验后，重量损失率在3.15%以下。
Composite mineral admixture and concrete
The invention relates to the technical field of concrete admixtures, and particularly discloses a composite mineral admixture and concrete. The composite mineral admixture comprises 0.2-1 part of a plastic expanding agent, 5-15 parts of an internal curing agent, 10-20 parts of organic fibers, 100-150 parts of silica fume and 800-900 parts of fly ash. Wherein the apparent density of the plastic expanding agent is 300-600 g/L; wherein the water absorption capacity of the internal curing agent is greater than 500g/g. The composite mineral admixture obtained in the invention is mixed with cement, fine aggregate, coarse aggregate and the like to prepare concrete. According to the present invention, the obtained concrete has characteristics of high expansion rate, high splitting tensile strength, high freeze-thaw resistance and low shrinkage rate, detection results show that the 3 h vertical expansion rate of the concrete is more than 0.52%, the 28 d shrinkage rate is more than-0.17%, the 28 d splitting tensile strength is more than 3.7, and the weight loss rate is less than 3.15% after 100 times of freeze-thaw experiments.
本申请涉及混凝土外加剂技术领域，具体公开了一种复合矿物掺合料及混凝土。所述复合矿物掺合料，包括塑性膨胀剂0.2‑1份、内养护剂5‑15份、有机纤维10‑20份、硅灰100‑150份、粉煤灰800‑900份；其中塑性膨胀剂的表观密度为300‑600g/L；其中内养护剂的吸水倍数大于500g/g。将本申请所得复合矿物掺合料与水泥、细骨料、粗骨料等进行混合，制得混凝土。所得混凝土具有较高的膨胀率、劈拉强度和冻融耐受性，以及较低的收缩率，经检测，混凝土的3h竖向膨胀率在0.52%以上，28d收缩率在‑0.17%以上，28d劈拉强度在3.7以上，100次冻融实验后，重量损失率在3.15%以下。
Composite mineral admixture and concrete
一种复合矿物掺合料及混凝土
WU HAO (author) / WANG JING (author) / KONG TAO (author) / WANG ZILONG (author) / LIU JUNYUAN (author) / LI DEJUN (author) / HE XINXIN (author) / WU XINJIANG (author) / ZHENG FUYING (author) / JI YE (author)
2024-05-14
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Mineral admixture, preparation method of mineral admixture and concrete
| European Patent Office | 2023