Results 31 to 40 of about 315,352 (293)

Optimization of Mixture Proportions for Concrete Pavements—Influence of Supplementary Cementitious Materials, Paste Content and Aggregate Gradation [PDF]

, 2012
The ultimate goals of this study included investigation of the optimal ranges for paste content, amount of cementations materials and aggregate gradation for concrete paving mixtures.
Rudy, Adam, Olek, Jan
core   +1 more source

Influences of CO₂ Absorption under Ultrasonic Vibration and Water-Reducer Addition on the Rheological Properties of Cement Paste

Applied Sciences, 2022
Research shows that ultrasonic vibratory stirring can effectively increase CO2 absorption by cement slurry. However, with the increase in CO2 absorption, the fluidity of slurry begins to decrease.
Lili Liu, Yongsheng Ji, Longhai Li, Jie Zhang   +3 more
doaj   +1 more source

Performance and Application of Spraying Acrylic Emulsion Cement Paste on Concrete Surface of Water Conveyance Tunnel

Renmin Zhujiang, 2023
In order to explore the applicability of acrylic emulsion cement paste in concrete surface protection of water conveyance structures,the fluidity,tensile strength,compressive strength,and flexural strength of acrylic emulsion cement paste were analyzed ...
CUI Dehao, TANG Jianhui, ZHANG Wei, TIAN Jialin, BAI Yin   +4 more
doaj  

Hydraulicity in Organic Polymers Enabled by Hydrophobization Upon Water‐Triggered Curing of Hydrophilic Chains

Angewandte Chemie, EarlyView.
Cement‐mimetic hydraulicity is realized in an organic polymer through a counterintuitive reaction in which a hydrophilic linear polymer reacts with water to undergo hydrophobization during curing via silatrane sol–gel chemistry. This polarity‐inverting curing process turns a water‐plasticized putty into a water‐tolerant rigid material, enabling ...
Rei Tokumitsu, Shio Uebo, Akira Takahashi, Hideyuki Otsuka   +3 more
wiley   +2 more sources

Research on the Thermal Conductivity of Ultrafine Graphite and Carbon Fiber Reinforced Cement for Well Cementing

Zuanjingye yu wanjingye
To reduce the thermal resistance between the wellbore of a geothermal well and the rock formation and enhance the heat extraction capacity of the geothermal well, this paper selects graphite (SG) with excellent thermal conductivity as the heat-conducting
Donghong DANG, Zhongwei HUANG, Pengfei QI, Hongke WANG, Qiang REN, Song PENG, Xiaowei CHENG   +6 more
doaj   +1 more source

Thermoplastic Rubber (TPR) Modified by a Silane Coupling Agent and Its Influence on the Mechanical Properties of Oil Well Cement Pastes

Advances in Materials Science and Engineering, 2019
The surface hydrophilicity of thermoplastic rubber (TPR) is poor, and the effect of using it directly in oil well cement is not good. TPR was modified by different silane coupling agents, and the hydrophilicity of the modified TPR was studied by Fourier ...
Jianjian Song, Mingbiao Xu, Weihong Liu, Xiaoliang Wang, Peng Xu, Feng Huang, Yonggong Pan   +6 more
doaj   +1 more source

A numerical-statistical approach to determining the representative elementary volume (REV) of cement paste for measuring diffusivity

Materiales de Construccion, 2010
Concrete diffusivity is a function of its microstructure on many scales, ranging from nanometres to millimetres. Multi-scale techniques are therefore needed to model this parameter.
M. Z. Zhang, G. Ye, K. van Breugel
doaj   +1 more source

Static and Fatigue Tests on Cementitious Cantilever Beams Using Nanoindenter

Micromachines, 2018
Cement paste is the main binding component in concrete and thus its fundamental properties are of great significance for understanding the fracture behaviour as well as the ageing process of concrete.
Yidong Gan, Hongzhi Zhang, Branko Šavija, Erik Schlangen, Klaas van Breugel   +4 more
doaj   +1 more source

Effect of Ultrafine Calcium Silicate on the Mechanical Properties of Oil Well Cement-Based Composite at Low Temperature

Applied Sciences, 2022
A low-temperature environment will reduce the hydration rate of oil well cement-based composites, resulting in the slow development of mechanical strength, which cannot meet the requirements of cementing operations. In order to improve the early strength
Jianglin Zhu, Xiangguang Jiang, Mingbiao Xu, Jianjian Song   +3 more
doaj   +1 more source

Microstructure evolution of hydrated cement pastes [PDF]

Physical Review E, 2005
We propose an original method based on both proton nuclear magnetic relaxation dispersion and high-resolution NMR spectra to investigate the microstructure of synthesized Ca3SiO5-hydrated cement paste. This method allows a clear assessment of the local proton chemical sites as well as the determination of dynamical information of moving proton species ...
Plassais, A., Pomies, M.P., Lequeux, N., Korb, J.P., Petit, D., Barberon, F., Bresson, B.   +6 more
openaire   +3 more sources