#1Yu Chen(TU Delft: Delft University of Technology)H-Index: 7
#2Shan He(TU Delft: Delft University of Technology)
Last. Erik Schlangen(TU Delft: Delft University of Technology)H-Index: 56
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Abstract null null This paper aims to investigate the influences of high Portland cement substitutions (>60 wt%) by low-grade calcined clay (CC) and limestone (LF) on 3D concrete printability, stiffness evolution and early-age hydration. Results show that, with the same dosage of admixtures (superplasticizer and viscosity modifier), increasing LF and CC content reduced the slump, flowability and initial material flow rate, and significantly improved the buildability of fresh mixtures, which can ...
#1Meenakshi Sharma(IITD: Indian Institute of Technology Delhi)H-Index: 1
#2Shashank Bishnoi(IITD: Indian Institute of Technology Delhi)H-Index: 15
Last. Karen Scrivener(EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 83
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Abstract null null This article reviews the rapidly developing state-of-the-art literature available on the subject of the recently developed limestone calcined clay cement (LC3). An introduction to the background leading to the development of LC3 is first discussed. The chemistry of LC3 hydration and its production are detailed. The influence of the properties of the raw materials and production conditions are discussed. The mixture design of concrete using LC3 and the mechanical and durability...
#1Yamei Cai(PolyU: Hong Kong Polytechnic University)H-Index: 1
#2Dongxing Xuan(PolyU: Hong Kong Polytechnic University)H-Index: 25
Last. Chi Sun Poon(PolyU: Hong Kong Polytechnic University)H-Index: 98
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Abstract null null This study explored the mechanism of the effect of seawater on tricalcium aluminate (C3A) hydration. The results showed that seawater retarded C3A hydration and reduced the reaction degree of C3A. The co-existence or ion pairing of Ca2+ and SO42− onto the surface of C3A poisoning the reactive sites is the main reason for this retardation. Besides, the precipitation of Mg(OH)2 on the surface of C3A would prolong the induction period for another 30 min and then consequently decr...
Abstract null null This paper presents an experimental study of concrete at meso-scale (aggregates, macro-pores and mortar matrix) in order to get a better understanding of the local failure mechanisms known to drive the macroscopic mechanical behaviour of the material. The main originality comes from conducting in-situ X-ray mechanical tests on micro-concrete samples of realistic composition (including cement, sand, aggregates and water), under uniaxial compression and, for the first time, unde...
#2Michal Hlobil(CAS: Academy of Sciences of the Czech Republic)
Last. M. Vopálenský(CAS: Academy of Sciences of the Czech Republic)H-Index: 2
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Abstract null null The changes in structural integrity and microstructure of Portland-limestone cement pastes were investigated in the course of magnesium sulfate attack at low temperature. A deterioration front, consisting of three distinct layers (brucite, gypsum, leached cement matrix), swelled in time due to the expansive nature of the deterioration products, generating cracks and subsequently detaching from the sound cement matrix, continuously promoting the process. Gypsum and thaumasite c...
Last. Victor C. Li(UM: University of Michigan)H-Index: 106
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Abstract null null Engineered Cementitious Composites (ECC) is an emerging cementitious composite material with ultra-high ductility. However, its higher cement dosage limits its material greenness and leads to concerns with drying shrinkage. In this research, an ECC utilizing limestone calcined clay cement (LC3) and calcium sulphoaluminate cement (CSA) is investigated, focusing on minimizing the material's embodied carbon while enhancing its durability with intrinsic self-stressing functionalit...