Results 11 to 20 of about 44,074,051 (232)
Interaction of chloride and CSH
Cement and Concrete Research, 1990 Abstract The chloride binding properties of synthetic CSH preparations having a wide range of C/S and H/S ratios are examined. Bound chloride is separated into two types, alcohol-insoluble and tightly held. Dependence of so-called chemisorbed chloride on C S ratio, C S ratio and surface area is observed.
Beaudoin, J. J. +2 more
openaire +3 more sources
The nanostructure and degradation of C-S-H in Portland and blended cements [PDF]
, 2007 The microstructure and composition of water and KOH activated hardened pastes of commercial neat white Portland cement (WPC) and blends with 30% fly ash (PFA) have been characterised using a multi-technique approach, With particular emphasis on the ...
Oliveira Morais de Sousa Girão, Ana Violeta
core +5 more sources
Competition between C–H‧‧‧S and S–H‧‧‧Cl H-bonds in CHCl3-H2S complex: A matrix isolation IR spectroscopic study [PDF]
, 2023 H-bonded complexes between CHCl3 and H2S have been studied in cold and inert argon matrix using IR spectroscopy. Both molecules were found to act as both H-bond donor and acceptor, resulting in two types of, namely C–H‧‧‧S and S–H‧‧‧Cl H-bonds.
Monu, Morwal +2 more
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Study of acidic degradation of alkali-activated materials using synthetic C-(N)-A-S-H and N-A-S-H gels [PDF]
, 2022 Alkali-activated materials (AAMs) are usually recognized having better acid resistance compared to ordinary Portland cement (OPC), however, the detailed mechanism has not been well studied due to the complexity of raw materials and hardened matrix.
Zhang, Zuhua +13 more
core +1 more source
Adsorption and Diffusion of Na+, Cs+ and Ca+2 Ions in C-S-H and C-a-S-H Nanopores [PDF]
, 2018 Cementitious materials act as a diffusion barrier, immobilizing liquid and solidradioactive waste and preventing their release into the biosphere. The retention capability of hydratedcement paste and its main hydration product, C-S-H gel, has been ...
Iñigo Lopez, Arbeloa +3 more
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地球与行星物理论评, 2023 The north-south convergence and east-west extension of the Tibet Plateau are accommodated by a series of active strike-slip and normal faults, and normal-fault earthquakes are very active in the plateau. During 2020 to 2021, there were three normal-fault
Jiangtao Qiu, Jianbao Sun
doaj +1 more source
An atomistic building block description of C-S-H - Towards a realistic C-S-H model [PDF]
Cement and Concrete Research, 2018 Abstract Understanding the atomistic structure of Calcium silicate hydrate (C-S-H), the main product of cement hydration, is of paramount importance to better formulate sustainable cement. The existing atomistic models are not in total agreement with experimental results and fail to explain the nanosized nature of C-S-H.
Mohamed, AK +3 more
openaire +2 more sources
Cement and Concrete Research, 2022 This work was supported by the "Departamento de Educacion, Politica Lingueistica y Cultura del Gobierno Vasco'' (IT1458-22) and the "Ministerio de Ciencia e Innovacion"(PID2019-106644GB-I00). The authors thank for technical and human support provided by SGIker (UPV/EHU/ERDF, EU). X.M.A.
Aretxabaleta, Xabier +4 more
openaire +2 more sources
The impact of metakaolin on the hydration of tricalcium silicate: effect of C-A-S-H precipitation
Frontiers in Materials, 2023 Introduction: Metakaolin (MK) is used as supplementary cementitious material to reduce the CO2 footprint of Portland cements. However, the early hydration of Portland cement (OPC) is often retarded due to its use.
T. Sowoidnich +4 more
doaj +1 more source
, 2023 This study investigates the decomposition of alkali-activated materials (AAMs) in sulfuric acid solution. Four sodium-containing calcium aluminium-substituted silicate hydrate (C-(N)-A-S-H) and aluminosilicate hydrate (N-A-S-H) gels with designed Ca/Si ...
Zhang, Zuhua +6 more
core +1 more source