Results 31 to 40 of about 8,189 (252)
Flow performance of hybrid cement based mortars [PDF]
, 2017 This paper reports experimental results of 32 hybrid cement mixes regarding the joint effect of sodium hydroxide concentration, the use of a commercial superplasticizer and a biopolymer on the flow and compressive strength performance.
Abdollahnejad, Zahra +2 more
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EPJ Web of Conferences, 2017 Superplasticizers are chemical admixtures used to fluidize cement pastes. Among them, polycarboxylate are comb-like copolymers with carboxylic acid and poly(ethylene glycol) side chains.
Tramaux A. +6 more
doaj +1 more source
Influence of superplasticizers on the evolution of ultrasonic P-wave velocity through cement pastes at early age [PDF]
, 2013 The paper discusses a possibility of using an ultrasonic wave transmission method to study the influence of superplasticizers on the formation of structure of cement pastes at early ages. When compared to mixtures without additives, lower P-wave velocity
Trtnik, Gregor, Turk, Goran
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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 +5 more
doaj +1 more source
, 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 +5 more
core +1 more source
Structural performance of steel-concrete sandwich beams with carbon nanofiber reinforcement [PDF]
, 2019 Cementitious materials such as concrete are typically characterised as quasi-brittle with low tensile strength and low strain capacity, which hence affect the long-term durability of the structure.
Ashraf S. Ayoub +19 more
core +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
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Tailored setting times with high compressive strengths in bassanite calcium sulfoaluminate eco-cements [PDF]
, 2016 This work deals with the hydration of a calcium sulfoaluminate (CSA) eco-cement prepared with bassanite and different additives (type and content) at a fixed water/CSA ratio of 0.5.
Cabeza-Diaz, Aurelio +6 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 +3 more
doaj
Case Studies in Construction MaterialsNano-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 +5 more
doaj +1 more source