Results 1 to 10 of about 2,981,376 (255)

Effect of Ultrafine Additives on the Morphology of Cement Hydration Products

Crystals, 2021
The present research is focused on the investigation of the influence of ultrafine additives on the structure formation of hardened cement paste and the establishment of the mechanisms of the morphological transformations, which determine the properties ...
Grigory Yakovlev, Rostislav Drochytka, Gintautas Skripkiūnas, Larisa Urkhanova, Irina Polyanskikh, Igor Pudov, Ekaterina Karpova, Zarina Saidova, Ali E. M. M. Elrefai   +8 more
doaj   +3 more sources

Effect of Citric Acid-Modified Chitosan on Hydration Regulation and Mechanism of Composite Cementitious Material System

Buildings, 2023
The temperature stress caused by the large temperature difference is the main factor causing harmful cracks in large-volume concrete. The introduction of admixtures is beneficial to reduce the temperature difference inside and outside the large-volume ...
Liguo Wang, Zhibin Qin, Jiandong Wu, Guangxia Sheng, Han Wang, Kai Liu, Xiaobin Dong, Fengjuan Wang, Jinyang Jiang   +8 more
doaj   +1 more source

Investigating the effect of polycarboxylate-ether based superplasticizer on the microstructure of cement paste during the setting process

Case Studies in Construction Materials, 2022
There is limited measure available to quantify the effect of polycarboxylate-ether based superplasticizer (PCE) on the microstructure of cement-based systems during the first 24 h.
Weiwei Zhu, Qingge Feng, Qi Luo, Jun Yan, Chun Lu   +4 more
doaj   +1 more source

DFT Study on the Compatibility Between Bentonite Clay Mineral and Hydration Products With the Polycarboxylate Water Reducer in the Cement Hydration Process

Frontiers in Earth Science, 2022
As one of the most used grouting materials, cement has the characteristics of low price and a wide resource of raw material. With the in-depth research and application of cement admixture, the compatibility between different water-reducing agents and ...
Huang Teng, Huang Teng, Zhihao He, Zhihao He, Zhihao He, Gao Meiben, Jiaxing Zhang, Jiaxing Zhang   +7 more
doaj   +1 more source

Early hydration and liquid phase characteristics of solidified body of clinker-free superfine tailings

工程科学学报, 2022
To investigate the early hydration and consolidation mechanism of superfine metal tailings powder in the CaO–CaSO4–H2O system, a clinker-free consolidation material based on iron tailings powder was prepared by superfine grinding lime, gypsum, and iron ...
Juan-hong LIU, Shu-hao AN, Ai-xiang WU, Hong-jiang WANG, Yue-yue ZHANG   +4 more
doaj   +1 more source

1-Butyl-3-methylimidazolium tetrafluoroborate as suitable solvent for BF3: the case of alkyne hydration. Chemistry vs electrochemistry

Beilstein Journal of Organic Chemistry, 2023
In order to replace the expensive metal/ligand catalysts and classic toxic and volatile solvents, commonly used for the hydration of alkynes, the hydration reaction of alkynes was studied in the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate (
Marta David, Elisa Galli, Richard C. D. Brown, Marta Feroci, Fabrizio Vetica, Martina Bortolami   +5 more
doaj   +1 more source

Study on hydration process of red clay cement grout and micro-morphology of grout stone

Meikuang Anquan, 2023
In order to study the hydration process of red clay cement grout prepared by red clay in the southwest Wumeng mountain area in southwest China and the micro-morphology of the grout stone, the hydration heat characteristics of red clay cement grout were ...
HE Wen
doaj   +1 more source

Hydration and Fractal Analysis on Low-Heat Portland Cement Pastes Using Thermodynamics-Based Methods

Fractal and Fractional, 2023
Low-heat Portland (LHP) cement is a kind of high-belite cement, which has the characteristic of low hydration heat. Currently, it is extensively used in the temperature control of mass concrete. Based on the thermodynamic database of OPC-based materials,
Yifan Zhou, Wenwei Li, Yuxiang Peng, Shengwen Tang, Lei Wang, Yan Shi, Yang Li, Yang Wang, Zhicheng Geng, Kai Wu   +9 more
doaj   +1 more source

A Comparative Study Between the Early Stages Hydration of a High Strength and Sulphate Resistant Portland Cement and the Type II F Portland Cement Through Non Conventional Differential Thermal Analysis and Thermogravimetry [PDF]

Materials Research, 2015
This work presents a study, which compares the early stages of hydration of a High Initial Strength and Sulphate Resistant Portland Cement (HIS SR PC) with those of Type II F Portland Cement (PC II), by Non-Conventional Differential Thermal Analysis ...
Alex Neves Junior, Marcelo Mendes Viana, Jo Dweck, Romildo Dias Toledo Filho   +3 more
doaj   +1 more source

Portland cement hydration in the presence of admixtures: black gram pulse and superplasticizer

Materials Research, 2008
Effect of admixtures such as black gram pulse (BGP) and sulfonated naphthalene based superplasticizer (SP) on the hydration of Portland cement has been studied. The hydration characteristics of OPC in the presence of BGP and SP were studied with the help
Viveka Nand Dwivedi, Shiva Saran Das, Nakshatra Bahadur Singh, Sarita Rai, Namdev Shriram Gajbhiye   +4 more
doaj   +1 more source