No abstract

No abstract

The paper presents the research results on the development of scientifically valid compositions of 3D printing construction mixes with improved performance characteristics. To regulate the physical, mechanical and technological properties of cement-based mixes, thermallymodified peat additive MT-600 is developed. The paper studies the world experience in the construction additive technology field. The experimental results are presented for cement paste and construction mixes with MT-600 additive for 3D printing. It is established that using the proposed fine additive increases the strength of the cement paste at early stages of hardening, which is the determining factor in the formation of building and technical characteristics for 3D printing. The X-ray phase analysis is carried out for the new composition of cement paste modified with MT-600 additive, which allows studying characteristics of the structure and properties of construction mixes during the hardening process.

Abstract. The paper is aimed at developing scientifically proven compositions of mortars for 3D printing modified by a peat-based admixture with improved operational characteristics. The paper outlines the results of experimental research on hardened cement paste and concrete mixture with the use of modifying admixture MT-600 (thermally modified peat). It is found that strength of hardened cement paste increases at early age when using finely dispersed admixtures, which is the key factor for formation of construction and technical specifications of concrete for 3D printing technologies. The composition of new formations of hardened cement paste modified by MT-600 admixture were obtained, which enabled to suggest the possibility of their physico-chemical interaction while hardening.

No abstract