Results 51 to 60 of about 9,303 (212)

High temperature fracture behavior and damage evolution of recycled aggregate concrete produced from metakaolin modified parent concrete

Structural Concrete, EarlyView.
Abstract The increasing use of recycled aggregate concrete (RAC) offers significant environmental benefits by reducing construction and demolition waste; however, its fracture performance and damage evolution under elevated temperatures remain insufficiently understood, particularly when recycled aggregates are derived from metakaolin modified parent ...
Zubair Yousuf, Viktor Hlavička
wiley   +1 more source

Combined effect of sodium sulphate and superplasticizer on the hydration of fly ash blended Portland® cement

Materials Research, 2010
Combined effect of polycarboxylate type superplasticizer and sodium sulphate on the hydration of fly ash blended Portland® cement has been studied by using different techniques.
Mukesh Kumar, Narendra Pratap Singh, Sanjay Kumar Singh, Nakshatra Bahadur Singh   +3 more
doaj   +1 more source

Synthesis of Triblock Polycarboxylate Superplasticizers with Well-Defined Structure and Its Dispersing Performance in β-Hemihydrate Gypsum

Molecules, 2023
In this work, a novel AaBAb-type triblock polycarboxylate superplasticizers (PCEs) with well defined molecular structures were designed and synthesized, firstly, by reversible addition-fragmentation chain transfer (RAFT) polymerization, to explore the ...
Guangming Guo, Guohua Gao, Weiliang Jiang, Xianglong Wang, Meishan Pei, Luyan Wang   +5 more
doaj   +1 more source

Achieving sustainable and durable concrete using high‐volume SiO2: Engineering properties, environmental and economic benefits

Structural Concrete, EarlyView.
Abstract This study explores the potential of high‐volume amorphous silica (SiO2) replacement for ordinary Portland cement (OPC) in concrete to reduce carbon emissions. Amorphous SiO2, such as silica fume (SF) and CO2 mineralization‐produced Si‐rich gel, offers superior properties to concrete but is under‐researched for its use in concrete with high ...
Xinlin Ji, Lijie Chen, R. K. L. Su
wiley   +1 more source

PHYSICO-MECHANICAL PROPERTIES OF CONCRETE MADE WITH THE MOST USED TYPES OF CEMENTS ADMIXED WITH POLYCARBOXYLATE SUPERPLASTICIZER IN THE CITY OF GOMA, DEMOCRATIC REPUBLIC OF CONGO

, 2022
The present work deals with the influence of the dosage of polycarboxylate plasticizer on the physico-mechanical properties of concretes made with the most used types of cements in the city of Goma in the Democratic Republic of Congo.
Amadou MOUNDOM, Trésor MUHATIKANI, Olivier BISHIKWABO MAHESHE   +2 more
core   +1 more source

Impact of Polycarboxylate Superplasticizers on the Kinetics and Morphology of Diffusion‐Controlled Crystal Growth: A Comparative Study of Gypsum and Calcium Hydroxide

ce/papers, Volume 9, Issue 6, Page 176-186, October 2026.
Abstract The influence of a polycarboxylate ether (PCE)‐based superplasticizer (SP 120) on the diffusion‐controlled crystallization of gypsum and calcium hydroxide was systematically investigated using a coaxial diffusion setup combined with XRD and SEM analyses.
Faiz M. Kakar, Nico Hesener, Christian Pritzel, Torsten Kowald, Manuela S. Killian   +4 more
wiley   +1 more source

Effect of Ultrafine Metakaolin on the Properties of Mortar and Concrete

Crystals, 2021
This study investigated the influence of ultrafine metakaolin replacing cement as a cementitious material on the properties of concrete and mortar. Two substitution levels of ultrafine metakaolin (9% and 15% by mass) were chosen.
Shengli Zhang, Yuqi Zhou, Jianwei Sun, Fanghui Han   +3 more
doaj   +1 more source

Superplasticizer Incompatibility in SuperSulfated Cement Containing BYF Clinker: Hydration, Microstructure, and Strength Development

ce/papers, Volume 9, Issue 6, Page 525-534, October 2026.
Abstract Low‐carbon supersulfated cements (SSC) are promising binders for reducing CO2 emissions because they contain high amounts of slag and only minor clinker. However, their practical use is still limited by slow early‐strength development and sensitivity to chemical admixtures.
Shakiba Azimi, Qiao Wang, Fabien Georget, Elsa Qoku, Paul Sandberg, Thomas Matschei   +5 more
wiley   +1 more source

Investigation on Mechanical Parameters and Microstructure of Soil-Based Controlled Low-Strength Materials with Polycarboxylate Superplasticizer

Applied Sciences
This study aims to optimize the sustainable utilization of excavated soil by incorporating it exclusively as a fine aggregate and cement in the formulation of soil-based controlled low-strength materials.
Qianqian Guo, Yonghui Chen, Jie Xu, Bingyi Li   +3 more
doaj   +1 more source

Carbonation of MgO‐Nesquehonite Cements

Journal of the American Ceramic Society, Volume 109, Issue 10, October 2026.
ABSTRACT MgO‐based binders containing hydrated magnesium carbonates are promising low‐carbon materials due to their ability to store CO2 during hardening and carbonation. This study investigates MgO‐nesquehonite (MgCO3ˑ3H2O) binders containing 0, 20 and 40 mass‐% of nesquehonite hydrated in N2‐filled desiccators or at 4 vol‐% CO2, as well as hydration ...
Paula Montserrat‐Torres, Frank Winnefeld, Barbara Lothenbach   +2 more
wiley   +1 more source