A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Self-compacting concrete and preparation method thereof
The invention belongs to the field of building materials, and particularly relates to self-compacting concrete and a preparation method thereof. The self-compacting concrete is prepared from, by weight, 200-325 parts of Portland cement, 100-135 parts of active admixture, 1350-1600 parts of aggregate, 8-15 parts of naphthalene-based superplasticizer and 150-190 parts of water; wherein the active admixture is an activated product obtained by calcining Bayer process red mud and coal gangue at 600-700 DEG C for 1-2 hours. According to the invention, the clay rock gangue, calcareous rock gangue andBayer process red mud are calcined at a certain temperature to obtain an active admixture; the goal of simultaneously activating the clay rock gangue and the Bayer process red mud is achieved; when the active admixture is added into self-compacting concrete, the strength and frost resistance of the self-compacting concrete can be remarkably improved, and the shrinkage performance of the self-compacting concrete can be improved, so that the possibility of cracking of the concrete is reduced, and excellent frost resistance and shrinkage performance can be obtained without adding an air entraining agent and an expanding agent.
本发明属于建筑材料领域，具体涉及一种自密实混凝土及其制备方法，包含以下重量份数的原料：硅酸盐水泥200～325份、活性掺合料100～135份、骨料1350～1600份、萘系高效减水剂8～15份及水150～190份；所述活性掺合料为拜耳法赤泥与煤矸石在600～700℃下煅烧1～2h后的获得的活化产物。本发明采用粘土岩矸石和钙质岩矸石与拜耳法赤泥在一定温度下煅烧获得一种活性掺合料，实现了同时活化粘土岩矸石及拜耳法赤泥的目的，将该活性掺合料加入到自密实混泥土中，能够显著提高自密实混凝土的强度、抗冻性能及改善自密实混凝土的收缩性能，从而减少混凝土开裂的可能，无需加入引气剂和膨胀剂即能获得优良的抗冻性能和收缩性能。
Self-compacting concrete and preparation method thereof
The invention belongs to the field of building materials, and particularly relates to self-compacting concrete and a preparation method thereof. The self-compacting concrete is prepared from, by weight, 200-325 parts of Portland cement, 100-135 parts of active admixture, 1350-1600 parts of aggregate, 8-15 parts of naphthalene-based superplasticizer and 150-190 parts of water; wherein the active admixture is an activated product obtained by calcining Bayer process red mud and coal gangue at 600-700 DEG C for 1-2 hours. According to the invention, the clay rock gangue, calcareous rock gangue andBayer process red mud are calcined at a certain temperature to obtain an active admixture; the goal of simultaneously activating the clay rock gangue and the Bayer process red mud is achieved; when the active admixture is added into self-compacting concrete, the strength and frost resistance of the self-compacting concrete can be remarkably improved, and the shrinkage performance of the self-compacting concrete can be improved, so that the possibility of cracking of the concrete is reduced, and excellent frost resistance and shrinkage performance can be obtained without adding an air entraining agent and an expanding agent.
本发明属于建筑材料领域，具体涉及一种自密实混凝土及其制备方法，包含以下重量份数的原料：硅酸盐水泥200～325份、活性掺合料100～135份、骨料1350～1600份、萘系高效减水剂8～15份及水150～190份；所述活性掺合料为拜耳法赤泥与煤矸石在600～700℃下煅烧1～2h后的获得的活化产物。本发明采用粘土岩矸石和钙质岩矸石与拜耳法赤泥在一定温度下煅烧获得一种活性掺合料，实现了同时活化粘土岩矸石及拜耳法赤泥的目的，将该活性掺合料加入到自密实混泥土中，能够显著提高自密实混凝土的强度、抗冻性能及改善自密实混凝土的收缩性能，从而减少混凝土开裂的可能，无需加入引气剂和膨胀剂即能获得优良的抗冻性能和收缩性能。
Self-compacting concrete and preparation method thereof
一种自密实混凝土及其制备方法
DENG JIEHUA (author)
2020-08-07
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2024