Sustainable lightweight engineered cementitious composites using limestone calcined clay cement (LC3)

Zhou, Yingwu; Gong, Guoqiang; Xi, Bin; Guo, Menghuan; Xing, Feng; Chen, Cheng

doi:10.1016/j.compositesb.2022.110183

Cited by 44 publications

(3 citation statements)

References 51 publications

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“…Thermal analyses, especially thermogravimetry and calorimetry, are basically used to investigate the behavior of the clays when subjected to temperature elevation and in the hydration process, by investigating the release and flow of heat from the mixtures for phase identification. These types of tests serve to demonstrate both the behavior of cement hydration when clays are added and the change in mass during the temperature change [ 100 , 101 , 102 , 103 , 104 , 105 , 106 ].…”

Section: Analysis Of the Approaches For Pozzolanic Activity Character...mentioning

confidence: 99%

Methods for Evaluating Pozzolanic Reactivity in Calcined Clays: A Review

Pinheiro¹,

Alexandre²,

Xavier³

et al. 2023

Materials

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The search for alternative materials to replace ordinary Portland cement has been the object of work that enhances the investigation of the use of pozzolanic materials and the reduction of the carbon footprint with supplementary cementitious materials. However, not all materials are available to meet the large-scale demand for cement replacement. A relevant exception is the calcined clay, a material found worldwide that, when subjected to appropriate heat treatment, presents pozzolanic reactivity and can be used as a supplementary material to cement. This review presents, through a systematic search, methods for measuring the pozzolanic reactivity of calcined clays, namely, direct, indirect, qualitative, quantitative, chemical and physical methods such as electrical conductivity (Lùxan), the force activity index, the modified Chapelle, R3, Frattini test, thermal analysis, X-ray diffraction and X-ray fluorescence spectrometry. The most usual methods to assess the pozzolanic reactivity of calcined clays were exposed and analyzed. It should be pointed out that there is greater use of the Frattini and modified Chapelle methods as well as the analysis of the mechanical strength behavior of the material in cementitious matrices. X-ray diffraction and thermal analysis were exposed as the most used correlation methods but it was also concluded that different tests are needed to generate accurate results.

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Section: Analysis Of the Approaches For Pozzolanic Activity Character...mentioning

confidence: 99%

Methods for Evaluating Pozzolanic Reactivity in Calcined Clays: A Review

Pinheiro¹,

Alexandre²,

Xavier³

et al. 2023

Materials

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“…Table 1 summarizes the parameters adopted in this paper with source of reference. The mix proportions of cement mortar and ECC, summarized in Table 2, are determined based on the authors’ previous research (Zhou et al., 2022).…”

Section: Case Studymentioning

confidence: 99%

“…Though ECC is claimed to be more sustainable than cement, the ecological advantages of ECC coating still remain questionable. For instance, the intensive use of cement and fine aggregates in ECC causes high cradle‐to‐gate ecological impacts (Damineli et al., 2010; Di Maria et al., 2020; Zhou et al., 2022). On the other hand, the extended service life due to the superior durability performance of ECC is supposed to eventually lower the amortized ecological impact.…”

Section: Introductionmentioning

confidence: 99%

Predicting the life cycle durability and ecological performance of cementitious coatings with a fuzzy‐stochastics–based approach

Huang

Zhou

et al. 2023

Computer aided Civil Eng

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Cementitious coating effectively prevents chloride‐induced corrosion in offshore reinforced concrete (RC) structures. Strain hardening cementitious composites (SHCC) is a class of advanced cementitious composites with superior ductility and durability. Due to the lack of long‐term test data, the current probability‐based design guidelines may not be applicable to SHCC coating. This paper develops a fuzzy‐stochastic–based approach to assess the durability performance of coatings using cement mortar and engineered cementitious composites (ECC), a specific type of SHCC. The age factor and the mean of chloride diffusion coefficient are modeled as fuzzy variables, and the chloride diffusion coefficient follows Gaussian distribution. Based on limited test data and subjective opinion, membership functions are proposed for the mean of initial chloride diffusion coefficient and the age factor of cement and ECC. To achieve equivalent durability performance of cement mortar coating, the amount of uncracked and cracked ECC coating are estimated to be around 33% and 25%, respectively. Based on equivalent durability performance, life cycle assessment (LCA) is conducted to compare the ecological performance of the two coatings. A case study, based on a 25‐m‐long simply supported box girder in Shenzhen Bay, is given to elaborate the proposed approach and the evaluation results of durability performance and ecological impacts.

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