Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Low-drying shrinkage high-performance recycled concrete
The invention discloses low-drying shrinkage high-performance recycled concrete satisfying pumping requirements, and belongs to the technical field of civil engineering concrete. Every cubic meter of the high-performance recycled concrete comprises 400-500 kg of binding material, 950-1150 kg of coarse aggregate, 660-715 kg of fine aggregate, 160-180 kg of water and 4-9 kg 0f superplasticizer, wherein the coarse aggregate is a recycled coarse aggregate or a mixture of the recycled coarse aggregate and natural coarse aggregate; the fine aggregate is a natural fine aggregate or a mixture of the natural fine aggregate and a recycled fine aggregate and prepared by a process of stone enveloped with cement. The strength grade of the obtained high-performance recycled concrete is C30-C50 and the slump is 180-210 mm; the dry shrinkage of the recycled concrete can be effectively improved to ensure that the dry shrinkage value is reduced by more than 25% relative to the common recycled concrete and lower than the common concrete with same proportion. The low-drying shrinkage high-performance recycled concrete has a significant theoretical value and social meaning for the reasonable and wide application of recycled concrete and the resource recovery of construction waste.
Low-drying shrinkage high-performance recycled concrete
The invention discloses low-drying shrinkage high-performance recycled concrete satisfying pumping requirements, and belongs to the technical field of civil engineering concrete. Every cubic meter of the high-performance recycled concrete comprises 400-500 kg of binding material, 950-1150 kg of coarse aggregate, 660-715 kg of fine aggregate, 160-180 kg of water and 4-9 kg 0f superplasticizer, wherein the coarse aggregate is a recycled coarse aggregate or a mixture of the recycled coarse aggregate and natural coarse aggregate; the fine aggregate is a natural fine aggregate or a mixture of the natural fine aggregate and a recycled fine aggregate and prepared by a process of stone enveloped with cement. The strength grade of the obtained high-performance recycled concrete is C30-C50 and the slump is 180-210 mm; the dry shrinkage of the recycled concrete can be effectively improved to ensure that the dry shrinkage value is reduced by more than 25% relative to the common recycled concrete and lower than the common concrete with same proportion. The low-drying shrinkage high-performance recycled concrete has a significant theoretical value and social meaning for the reasonable and wide application of recycled concrete and the resource recovery of construction waste.
Low-drying shrinkage high-performance recycled concrete
CHEN XIN (Autor:in) / ZHENG JIANLAN (Autor:in) / LUO SURONG (Autor:in) / WANG XUEFANG (Autor:in) / WANG GUOJIE (Autor:in)
06.05.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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