Results 31 to 40 of about 7,786 (229)

Evaluating the Antimicrobial Properties of Glass Ionomer, Zinc Phosphate, and Polycarboxylate Cement

Majallah-i dānishgāh-i ̒ulūm-i pizishkī-i Arāk, 2021
Background and Aim: There exists increased demineralization risk of enamel adjacent to fixed orthodontic attachments by cariogenic bacterias (e.g., Streptpcoccus mutans, Streptpcoccus sobrinus) and inadequate data about commonly used orthodontic cements.
Rahil Mirzaei, Mehdi Javad Chavosh, Mehdi Rajabnia, Valiollah Arash, Ali Bijiani, Maysam Mirzaie, Mohamad Mehdi Naghibi Sistani   +6 more
doaj  

Dispersion of Carbon Nanotubes with Different Types of Superplasticizer as a Dispersing Agent for Self-Sensing Cementitious Materials

Applied Sciences, 2021
Due to their exceptional electrical properties, carbon nanotubes (CNTs) can be applied as conductive fillers to develop self-sensing cement-based matrices.
Pedro de Almeida Carísio, Yasmim Gabriela dos Santos Mendonça, Carlos Fernando Teodósio Soares, Oscar Aurelio Mendoza Reales, Eduardo de Moraes Rego Fairbairn, Romildo Dias Toledo Filho   +5 more
doaj   +1 more source

Methodological Substantiation of the choice for a stabilizer for bismuth titanate fine particles suspensions [PDF]

Нанотехнологии в строительстве, 2023
: Introduction. The current stage of the construction industry and building materials science development involves the introduction and widespread application of nano- and fine particles capable of improving the properties of traditional materials ...
Svetlana V. Samchenko, Irina V. Kozlova, Olga V. Zemskova, Marina O. Dudareva   +3 more
doaj   +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

Structure-property relationships for polycarboxylate ether superplasticizers by means of RAFT polymerization

, 2019
Hypothesis: Polycarboxylate ether (PCE) comb-copolymers are widely used as water reducing agents in the concrete industry while maintaining a high fluidity via the polymer adsorption to the cement particles.
De Schutter, Geert, El Cheikh, Khadija, Hoogenboom, Richard, Lesage, Karel, Muhammad, Metwally, Xu, Xiaowen   +5 more
core   +1 more source

Investigation of the Incompatibilities of Cement and Superplasticizers and Their Influence on the Rheological Behavior [PDF]

, 2020
The rheological behavior of cement paste and the improvement of its flowability takes center stage in many research projects. An improved flowability can be achieved by the addition of superplasticizers (SP), such as polycarboxylate ethers (PCE).
Jakob, Cordula, Jansen, Daniel, Neubauer, Jürgen, Pott, Ursula, Stephan, Dietmar   +4 more
core   +2 more sources

Impact of air entrainment on the microstructure and mechanical performance of high performance mortar [PDF]

, 2014
At the Magnel Laboratory for Concrete Research an intensive vacuum mixer which can regulate the air pressure is available. As such the amount of entrapped air in cementitious materials can be varied.
Boel, Veerle, De Schutter, Geert, Dils, Jeroen   +2 more
core   +2 more sources

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  

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

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