Results 51 to 60 of about 33,572 (231)

Influence of formation water ion composition on cement lurry performance and countermeasures: Case study

South African Journal of Chemical Engineering, 2021
Logging data of Tazhong clastic rock formation shows that cementing quality of water layer is poor and the efficiency of cement displacement is low. Bohai Drilling Co., Ltd. has adopted a cement slurry system with excellent anti-channeling performance in
He Xuan-peng, Tian hui, Wang Xue-long, Tan Da-bing, Wang Ya-rong, Cheng Tian-hui, Liu Hua-jie   +6 more
doaj   +1 more source

Multiple injection techniques to stimulate complex fracture networks in coal reservoirs: A case study on gas disaster reduction of subsurface coal mine in southwest China

Deep Underground Science and Engineering, EarlyView.
An experimental device for physical simulation of hydraulic fracturing, comprising: a load‐bearing mechanism with multiple interconnected plates that collectively form an sample chamber; a load‐generating mechanisms, with multiple load‐generating mechanisms arranged within the experimental chamber.
Delei Shang, Farui Shi, Jun Lu, Minghui Li, Cunbao Li, Heping Xie   +5 more
wiley   +1 more source

Preparation and Properties of Epoxy Resin Emulsion Cement

Chemical Engineering Transactions, 2018
Considering the fact that traditional cementing stone lacks toughness., post-production operations in oil wells often cause various forms of stress to cause cementing rings to produce micro-cracks or microcracks that are difficult to repair, which may ...
Yihang Zhang, Li Cheng, Ruiquan Liao, Zhen Li, Kangwei Zhang, Long Yuan, Gang Liu   +6 more
doaj   +1 more source

Research on Soft Rocks for the Construction of Roadbeds for High-Speed Railroad: Effect of Water Soaking Environment

Advances in Materials Science and Engineering, 2022
The strength of the roadbed composed of soft rock decreases following water immersion. Cement slurry is mixed with a soft rock to strengthen the soft rock roadbed to address this problem. The uniaxial compressive strength was determined, and the triaxial
Xiangdong Zhang, Jie Geng, Yuebo Xu, Zhongchao Zhou, Shuai Pang   +4 more
doaj   +1 more source

Study on the composite fracture characteristics of filling and reinforcing cracked rock mass after high temperature damage

Deep Underground Science and Engineering, EarlyView.
Cement infill shares compressive and shear stresses during loading, while interfacial friction hinders crack propagation and reduces stress concentration, improving the rock's load‐bearing capacity. Failure modes vary with crack inclination. Unfilled specimens show four modes.
Shihao Yuan, Qiang Sun, Jianjun Hu, Liwei Zhang, Jishi Geng   +4 more
wiley   +1 more source

Development of a compact excavator mounted dust suppression system [PDF]

, 2013
This paper reports on the investigation of an excavator mounted dust suppression system for demolition and construction activities. Ever increasing pressure is placed on contractors to improve their environmental performance, especially dust emissions ...
Ahn, Ahn, Arikan, Bartell, Copeland, De Vocht, Dimari, Driussi, Edwards, Gambatese, Gunson, Holman, HSE, HSE, Innovative Technology, Kaveri Ultra Ltd, Kieran Andrew Wallace, Larman, Linnainmaa, Makuch, Mondal, Nij, Petavratzi, Peterson, Pope, Sealpump, Turnkey, Turnkey, Vallero, Wai Ming Cheung, Wessexwater, Wu, Zhao   +32 more
core   +1 more source

Carbon Dots: An Emerging Frontier for Green and Sustainable Civil Engineering Materials

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Traditional civil engineering materials (CE materials) are usually involved with high‐energy consumption during manufacturing, significant maintenance costs, and substantial environmental impacts throughout their life cycles. The progress of nanotechnology is catalyzing a green and sustainable transformation within the field.
Weiwen Hao, Xiaolong Wang, Xiao Chen, Dong Liu, Zhenhui Kang, Cheng Zhu   +5 more
wiley   +1 more source

Irreversible time-dependent rheological behavior of cement slurries : constitutive model and experiments [PDF]

, 2019
Over the last few decades, much focus has been given to investigating the reversible rheological behavior of thixotropic materials, but the description of the rheology of materials undergoing an irreversible process is still challenging.
Althoff, Heloisa, de Souza Mendes, Paulo R., Marchesini, Flavio H., Oliveira, Rafael M.   +3 more
core   +1 more source

Electrospun Nanofibres for Load‐Bearing Composite Materials—A Review of Techniques, Mechanical Properties and Durability

Polymer Composites, EarlyView.
Electrospun nanofibre for load‐bearing composite materials. ABSTRACT Electrospun nanofibres are emerging nanomaterials prized for their scalability, high surface area to volume ratio and yield. Their effectiveness in improving the mechanical properties of fiber reinforced composites is widely reported. Nanofibres could activate multiscale toughness and
Usaid Ahmed Shakil, Petr Hájek
wiley   +1 more source

Analyzing Cement Rheological Properties Using Different Additive Schemes at High Pressure and High Temperature Conditions

Mehran University Research Journal of Engineering and Technology, 2020
The experimental study was conducted on rheological properties in laboratory to measure the integrity of cement slurry. Three samples were used and analyzed at different parameters to check the elasticity of cement slurry.
Khalil Rehman Memon, Aftab Ahmed Mahesar, Shahzad Ali Baladi, Muhannad Talib Sukar   +3 more
doaj   +1 more source