Results 21 to 30 of about 1,267 (161)

Mechanisms behind grouting pressure jumping in low-permeability limestones and techniques for grouting pressure control

Meitian dizhi yu kantan
BackgroundThe exploitation of the Carboniferous-Permian coalfields in China is gradually transitioning toward coal seams in lower formations. In this context, issues including the confined water hazards in the floor and karst water preservation become ...
Zhenli FAN, Lutong CAO, Yong CUI, Zhiwei ZHANG, Fengda ZHANG   +4 more
doaj   +1 more source

Effects of limestone filler fineness on the rheological behavior of cement – Limestone filler grouts

Ain Shams Engineering Journal, 2021
An acceptable viscosity and an easy penetrability of cement - limestone filler grout in the granular matrix of self compacting concrete are an important factors that affecting both its rheological and its hardened properties.
Omrane Benjeddou, Mamdooh Alwetaishi, Morched Tounsi, Rayed Alyousef, Hisham Alabduljabbar   +4 more
doaj   +1 more source

Experimental and Numerical Study on the Permeation Grouting Diffusion Mechanism considering Filtration Effects

Geofluids, 2021
Permeation grouting estimation is important for the design of grouting engineering. Filtration effects and rheological behavior play a key role in permeation grouting diffusion of cement-based grouts.
Guangxuan Zhu, Qingsong Zhang, Rentai Liu, Jiwen Bai, Wei Li, Xiao Feng   +5 more
doaj   +1 more source

Characterization of fresh and hardened state properties of grouts for use in structural masonry

Revista IBRACON de Estruturas e Materiais, 2023
Grout is a material usually applied to enhance the mechanical properties of structural masonry. As such, the demand for grout has been growing parallel to the demand for structural masonry.
José Augusto Ferreira Sales de Mesquita, Mércia Maria Semensato Bottura de Barros, Luiz Sérgio Franco, Rafael Giuliano Pileggi, Roberto Cesar de Oliveira Romano   +4 more
doaj   +1 more source

Development of a Semirigid Pavement Incorporating Ultrarapid Hardening Cement and Chemical Admixtures for Cement Grouts

Advances in Materials Science and Engineering, 2017
Mechanical tests were carried out to evaluate the influence and effects of fluidity and compressive strength of cement grout on semirigid asphalt pavement.
Jin Wook Bang, Byung Jae Lee, Yun Yong Kim   +2 more
doaj   +1 more source

Plugging and Its Stability Evaluation for the Ore Pass in the Nonempty Condition Based on Controllable Grouting of Cement-Sodium Silicate Grout

Geofluids, 2021
Aimed at the problem to plug the main ore pass with the large collapse at Xingshan Iron Mine, the viscosity-time test and the heap perfusion test of cement-silicate grout in a loose rock mass are carried out.
Ye Yuan, Dengpan Qiao, Shibo Yu
doaj   +1 more source

Silanization of SiO₂ Decorated Carbon Nanosheets from Rice Husk Ash and Its Effect on Workability and Hydration of Cement Grouts

Nanomaterials, 2021
Rice husk ash (RHA) having a porous sructure and a high amount of amorphous silica nanoparticles (4 nm) decorated on the surface of carbon nanosheets is a suitable and cheap candidate for the use of a grout additive.
Ilayda Berktas, Ojas Chaudhari, Ali Nejad Ghafar, Yusuf Menceloglu, Burcu Saner Okan   +4 more
doaj   +1 more source

Data‐driven analysis of the spatial dependence of grouting efficiency during tunnel excavation

Deep Underground Science and Engineering, EarlyView.
Prediction of grouting efficiency using machine learning is enhanced by adopting a training strategy that accounts for the grouting process across multiple rounds. Abstract Grouting with water–cement mixtures is the most widely used and cost‐effective method for managing excess water inflow during tunnel construction.
Huaxin Liu, Xunchang Fei, Wei Wu
wiley   +1 more source

Effects of elevated ground temperatures on properties of cement grouts for deep rock grouting

Deep Underground Science and Engineering
Appropriate determination of the mix ratios of cement grouts is of vital importance to the quality of rock grouting and the risk reduction of groundwater inflow.
Zhipeng Xu, Jianping Sun, Runguo Li, Lei He, Changwu Liu   +4 more
doaj   +1 more source

An experimental study on the yield strength of cement grout for grouting in the limestone area of a coal seam floor

Meitian dizhi yu kantan
Objective and MethodsIn recent years, regional grouting through ground directional drilling has become the preferred technique for water disaster prevention and control in floor limestones in a coal mining area.
Jun ZOU, Yan GUO, Herong GUI, Weimin WANG, Zhenlin CHEN, Faming LIU, Yanan DAI, Yang HU, Zengbao CHEN, Jun LI, Chuan GAO, Heng LI   +11 more
doaj   +1 more source