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Mechanical properties of fiber reinforced concrete with composite binder

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Document pages: 13 pages

Abstract: This paper studies the production of high density impermeable concrete. The effect of "cement, fly ash and limestone " composite binder obtained by combined grinding with superplasticizer in varioplantary mill on the formation process of structure was studied. The densification of micro and nano structures was characterized by different techniques: X-ray diffraction, DTA-TGA and electron microscope. The results show that during alite hardening, due to the combination of Ca (OH) 2 and the grinding of active mineral additives, the ash particles produce crystal centers, which aggravates the hydration process of clinker minerals; The presence of fine-grained limestone can also lead to the formation of calcium hydrocarbon aluminate. Relationship between cement stone and cement stonelasms composition as well as fibrous concrete porosity and permeability of composite at nanoscale level for use of composite binders with polydispersed mineral supplements was revealed. The results are of potential importance in developing the wide range of fine-grained fiber-reinforced concrete with a compressive strength more than 100 MPa, with low permeability under actual operating conditions.

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