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Shrinkage-compensating concrete and preparation method thereof
The invention discloses shrinkage-compensating concrete which comprises the following raw material components in parts by weight: 296 to 340 parts of cement, 708 to 768 parts of medium sand, 1025 to 1050 parts of broken stone, 30 to 45 parts of fly ash, 9.6 to 11.6 parts of an additive, 36 to 68 parts of an expanding agent, 150 to 160 parts of water, wherein the water-binder ratio is 0.33 to 0.43;the preparation method comprises the following steps: S1, mixing and stirring the medium sand, the gravels and the water to obtain a pre-mixture; S2, mixing and stirring cement, fly ash and an expanding agent with the pre-mixture to obtain an intermediate mixture; S3, mixing and stirring the admixture and the intermediate mixture to obtain cement mortar; and S4, putting the cement mortar into a mold, and curing the cement mortar under specific conditions to obtain the high-shrinkage-compensation concrete. The slump loss of the high-compensation shrinkage concrete is reduced, and the compressive strength of the concrete is improved.
本发明公开了一种补偿收缩的混凝土，包含以下重量份数的原料组分：水泥：296～340份；中砂：708～768份；碎石：1025～1050份；粉煤灰：30～45份；外加剂：9.6～11.6份；膨胀剂：36～68份；水：150～160份；水胶比为0.33～0.43；其制备方法为：S1、将中砂、碎石和水混合搅拌，即得预混合物；S2、将水泥、粉煤灰和膨胀剂与预混合物混合搅拌，即可得到中间混合物；S3、将外加剂与中间混合物混合搅拌，即得水泥胶浆；S4、将水泥胶浆装入模具中，在特定条件下养护，即得高补偿收缩混凝土。本发明获得的高补偿收缩混凝土坍落度损失降低，同时混凝土抗压强度提高。
Shrinkage-compensating concrete and preparation method thereof
The invention discloses shrinkage-compensating concrete which comprises the following raw material components in parts by weight: 296 to 340 parts of cement, 708 to 768 parts of medium sand, 1025 to 1050 parts of broken stone, 30 to 45 parts of fly ash, 9.6 to 11.6 parts of an additive, 36 to 68 parts of an expanding agent, 150 to 160 parts of water, wherein the water-binder ratio is 0.33 to 0.43;the preparation method comprises the following steps: S1, mixing and stirring the medium sand, the gravels and the water to obtain a pre-mixture; S2, mixing and stirring cement, fly ash and an expanding agent with the pre-mixture to obtain an intermediate mixture; S3, mixing and stirring the admixture and the intermediate mixture to obtain cement mortar; and S4, putting the cement mortar into a mold, and curing the cement mortar under specific conditions to obtain the high-shrinkage-compensation concrete. The slump loss of the high-compensation shrinkage concrete is reduced, and the compressive strength of the concrete is improved.
本发明公开了一种补偿收缩的混凝土，包含以下重量份数的原料组分：水泥：296～340份；中砂：708～768份；碎石：1025～1050份；粉煤灰：30～45份；外加剂：9.6～11.6份；膨胀剂：36～68份；水：150～160份；水胶比为0.33～0.43；其制备方法为：S1、将中砂、碎石和水混合搅拌，即得预混合物；S2、将水泥、粉煤灰和膨胀剂与预混合物混合搅拌，即可得到中间混合物；S3、将外加剂与中间混合物混合搅拌，即得水泥胶浆；S4、将水泥胶浆装入模具中，在特定条件下养护，即得高补偿收缩混凝土。本发明获得的高补偿收缩混凝土坍落度损失降低，同时混凝土抗压强度提高。
Shrinkage-compensating concrete and preparation method thereof
一种补偿收缩的混凝土及其制备方法
LUO HUAN (author) / SU WEIQUN (author) / OU TENGTENG (author)
2020-09-25
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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