3D-printable aeolian sand anti-freezing concrete as well as preparation method and use method thereof

Abstract

The invention provides 3D-printable aeolian sand anti-freezing concrete as well as a preparation method and a use method thereof, and belongs to the technical field of concrete. The aeolian sand anti-freezing concrete capable of 3D printing provided by the invention is prepared from the following preparation raw materials in parts by weight: 166-186 parts of Portland cement not lower than 42.5 grade; 3 to 13 parts of silica fume; 6 to 16 parts of fly ash; 330 to 350 parts of aeolian sand; 1-5 parts of a water reducing agent; 0.1 to 1.5 parts of cellulose ether; 0.05 to 0.5 part of starch ether; 0.1 to 1.5 parts of a defoaming agent; 0.2 to 4 parts of polypropylene fiber; 60 to 75 parts of water; the aeolian sand is aeolian sand subjected to alkali treatment. The aeolian sand anti-freezing concrete provided by the invention not only can realize 3D printing, but also is excellent in mechanical property and durability, and the conditions of shortage of natural sand and abundant aeolian sand resources in desert areas are adjusted according to local conditions, and local materials are used.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a 3D-printable aeolian sand-resistant concrete and a preparation method and application method thereof. Background technique [0002] In recent years, concrete 3D printing (3DCP), as a new type of intelligent additive construction technology, has received widespread attention from all over the world, and has achieved many achievements in the construction of landscape sketches, infrastructure and building structures. An effective way to automate and automate. Compared with the traditional construction technology, 3DCP has the advantages of no mold, less consumables, high degree of design freedom, short construction period, and low labor demand. It has great application prospects in engineering construction in remote areas. Especially in desert areas, the infrastructure construction in this area has always been constrained by the harsh construction environment and high labor dema...

AI Technical Summary

Problems solved by technology

[0004] However, the concrete prepared by aeolian sand is used for 3D printing. The layer-by-layer molding method in the 3D printing process reduces the integrity of the concrete matrix, and inevitably introduces a certain amount of weak bonding surfaces and stacking voids, resulting in material failure. The mesoscopic heterogeneity and anisotropy will weaken the mechanical properties and durability of printing materials, especially the freeze-thaw resistance

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