Results 31 to 40 of about 3,724 (225)

Effect of Polycarboxylate-Silane Modified Graphene Oxide Composite on the Properties of Cement Pastes

, 2022
As a nano-carbon material with excellent properties, Graphene oxide (GO) has been widely used in cement-based materials, and the negative effect of paste workability caused by GO agglomeration has also been widely concerning.
Shuang Liu, Xiao Liu, Li, Shiyu, Qin Wang, Zhang, Ruifeng, Ruifeng Zhang, Shiyu Li, Liu, Xiao, Liu, Shuang, Wang, Qin   +9 more
core   +1 more source

Mathematical models of apparent viscosity as a function of water–cement/binder ratio and superplasticizer in cement pastes

Scientific Reports, 2023
The water–cement/binder ratio and the admixture of water-reducing agents strongly affect the rheological properties of cement pastes. This study develops mathematical models to predict the apparent viscosity of cement pastes with varying water-cement ...
Yong Yuan, Xiaoyun Wang, Xi Chen, Peng Xiao, Eduardus Koenders, Ying Dai   +5 more
doaj   +1 more source

Effect of Polycarboxylate Superplasticizer in Ordinary Portland Cement and Sulfate Resistant Cement

, 2023
Polycarboxylate superplasticizers (PCE) are the most widely used admixtures in today’s cementitious construction materials. The molecular structure has a decisive influence on the effectiveness of PCE, which also can be tailored to serve in a different ...
Schmidt, Wolfram, Mezhov, Alexander, Zhang, K.   +2 more
core   +1 more source

The effect of die spacer on retention and fitting of complete cast crowns

Journal of Craniomaxillofacial Research, 2022
Purpose: Loss of the bracket-tooth bond is one of the most common complaints of patients during orthodontic treatment. Various factors play a role in preventing the loss of such a strong bond between the bracket and tooth, one of which is the ...
Mohammad Reza Hajimahmoudi, Somayyeh Niakan, Hossein Mohebbi, Romina Sarooghi   +3 more
doaj  

Property enhancement and mechanism of cement-based composites from the perspective of nano-silica dispersion improvement

Case Studies in Construction Materials
Nano-silica (NS) exhibits significant potential for enhancing the properties of cement materials. However, its effectiveness in improving the properties of cement-based materials is hindered by the poor dispersion of NS within the cement matrix.
Tonghuan Zhang, Zhenjun Wang, Wei Wang, Gang Li, Haoyan Guo, Haibao Zhang   +5 more
doaj   +1 more source

Foamed Concrete Sealing Materials for Coal Seam Gas Drainage Boreholes: A Review

Safety Science and Technology, EarlyView.
This study investigates the sealing performance of foamed concrete in gas drainage boreholes. By comparing leakage pathways (a, c) with sealed systems (b, d), the research demonstrates how foamed concrete effectively fills mining‐induced fractures and resists deformation.
Jiaxing Zou, Erlei Su, Huanchun Liu, Xiangjun Chen, Lin Wang, Haidong Chen, Lin Li   +6 more
wiley   +1 more source

Concentration effects in the rheology of cement pastes: Krieger-Dougherty revisited [PDF]

, 2011
Cement pastes are concentrated suspensions of granular particles in water and their rheology strongly affects the behaviour of all concretes and other cementitious materials.
Banfill, Phillip Frank Gower
core  

Developments In Orthodontıc Cements

Turkish Journal of Orthodontics, 1994
In this literature review dental cements which were used for banding orthodontic attachments to teeth were evaluated. The general properties of zincphosphate cement, polycarboxylate cement and recently developed glass ionomer cements were discussed.
İlken Kocadereli
doaj   +1 more source

Research on performance of new type cement slurry for water shutoff in coal mine roadway

Meikuang Anquan, 2021
In view of the problem that the water gushing problem of deep coal mine roadway seriously affects the safety of coal mine construction, and the common cement grout is difficult to seal up the tiny rock cracks, the micron-grade fly ash is used to replace
LIU Huini, LI Xungang, LI Yanzhi, ZHANG Shuai, CHEN Pengcheng, WU Yue, FAN Zhenwang, TANG Chao
doaj   +1 more source

Behavior of manufactured sand and recycled coarse aggregate concrete‐filled steel tubular stub columns with circular section

Structural Concrete, EarlyView.
Abstract Accelerated urbanization has intensified environmental concerns due to excessive natural resource consumption and construction waste generation. Circular concrete‐filled steel tube (CFST) columns incorporating manufactured sand recycled coarse aggregate (MS‐RCA) concrete have emerged as an innovative composite element offering notable ...
Minsheng Guan, Qi Chen, Gang Wang, Aiguo Xiong, Ying Wang, Le Li, Anne W. M. Ng, Qing Quan Liang   +7 more
wiley   +1 more source