Carbon fiber reinforced nano metakaolin recycled concrete and preparation method thereof

Abstract

The invention belongs to the technical field of recycled concrete, and particularly relates to carbon fiber nano metakaolin recycled concrete and a preparation method thereof.The recycled concrete is prepared from, by weight, 0-3.5 parts of carbon fibers, 0-45 parts of nano metakaolin, 175-1166 parts of recycled coarse aggregate, 0-991 parts of natural coarse aggregate, 656 parts of natural fine aggregate and 3.7 parts of sodium dodecyl benzene sulfonate; 328 to 373 parts of cement and 215 to 249 parts of water; the recycled concrete has the advantages of good compressive strength, good splitting tensile strength, good ductility and the like, the used raw materials are low in cost, and a foundation is laid for wide application of the recycled concrete while the problem of environmental pollution caused by construction waste is solved and the problem of over mining of natural coarse aggregate is relieved.

Description

technical field [0001] The invention belongs to the technical field of recycled concrete, in particular to a carbon fiber reinforced nanometer metakaolin recycled concrete and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of urbanization, on the one hand, the demand for building materials - natural coarse aggregates has increased sharply. It produces immeasurable amount of construction waste. It is difficult to effectively deal with the rapidly increasing amount of construction waste by following the traditional methods of disposal, such as landfilling and piling on selected sites, which will have a huge impact on the ecological environment and the surrounding living environment. [0003] In order to effectively solve the construction waste generated by demolition of old buildings, recycled concrete technology is used to partially or completely replace natural coarse aggregate with recycled coarse aggregate. However...

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Problems solved by technology

But at the same time, the addition of fibers will reduce the compactness of the internal structure of recycled concrete, thus affecting the compressive strength of recycled concrete.

[0006] Therefore, in order to solve the problem of insufficient mechanical properties of recycled concrete, a method for preparing recycled concrete is urgently needed to improve the application of recycled concrete in practical engineering.