Investigation of using limestone calcined clay cement (LC3) in engineered cementitious composites: The effect of propylene fibers and the curing system
Artikel i vetenskaplig tidskrift, 2021

Limestone calcined clay cement (LC3) is a new type of low-carbon cement that can reduce energy consumption and carbon dioxide emissions while meeting the performance requirements of ordinary cement. In this study, polypropylene (PP) fibers were mixed into limestone calcined clay cement-based materials to make new low-carbon ECCs. In this study, a total of 24 sets of specimens were designed for 4 groups of curing ages and 6 types of mix ratios. The compressive load–displacement data were measured the compressive curve characteristics were analyzed then, a compressive constitutive model of the composites was deduced and obtained. Through XRD, SEM-EDS and MIP experiments, the reasons and laws of the compressive strength ranges of adding PP fibers and LC3 to engineered cementitious composites (LC3-PP-ECCs) are further explained from the perspective of the pore size, microstructures and hydration products. The results show that, after 28 days, the compressive strength values of LC3-PP-ECCs generally decreases with increasing PP fiber content and the combined effect of PP fibers and hydration products causes the compressive strength of LC3-ECCs with 0.5% PP fibers to drop sharply. In addition, the specimens showed better properties in terms of toughness, ductility and energy absorption. However, in the microstructures, the addition of PP fibers will cause more internal defects and flaws. This results of this study can provide some theoretical experience and technical support for the engineering application of LC3-ECCs.

PP fibers

Limestone calcined clay cement (LC3)

Microstructures

Improved compressive constitutive model

Engineered cementitious composites (ECCs)

Pore size and porosity

Författare

Jun Liu

Shenzhen University

Weizhuo Zhang

Shenzhen University

Zhenlin Li

Shenzhen University

Hesong Jin

Shenzhen University

W. Liu

Shenzhen University

Luping Tang

Chalmers, Arkitektur och samhällsbyggnadsteknik, Byggnadsteknologi

Journal of Materials Research and Technology

2238-7854 (eISSN)

Vol. 15 2117-2144

Ämneskategorier

Pappers-, massa- och fiberteknik

Annan materialteknik

Kompositmaterial och -teknik

Styrkeområden

Materialvetenskap

DOI

10.1016/j.jmrt.2021.09.023

Mer information

Senast uppdaterat

2021-10-06