Results 221 to 230 of about 3,514,032 (266)

Effect of compression casting method on the compressive strength, elastic modulus and microstructure of rubber concrete

, 2020
Recycling rubber in the production of structural concrete is not considered a feasible option due to a significant reduction in the strength and elastic modulus of concrete.
Yufei Wu, S. Kazmi, M. Munir, Yingwu Zhou, F. Xing   +4 more
semanticscholar   +1 more source

Study on compressive strength and durability of alkali-activated coal gangue-slag concrete and its mechanism

Powder Technology, 2020
In this paper, AACGS concrete was prepared by using raw and 700 °C calcined coal gangue as the coarse aggregate and alkali-activated coal gangue-slag (AACGS) as the cementitious material.
Hongqiang Ma, Hongguang Zhu, Chao Wu, Hongyu Chen, Jianwei Sun, Jinyan Liu   +5 more
semanticscholar   +1 more source

A generalized method to predict the compressive strength of high-performance concrete by improved random forest algorithm

Construction and Building Materials, 2019
The prediction results of high-performance concrete compressive strength (HPCCS) based on machine learning methods are seriously influenced by input variables and model parameters.
Q. Han, Changqing Gui, Jie Xu, G. Lacidogna   +3 more
semanticscholar   +1 more source

Comparison of artificial neural network (ANN) and response surface methodology (RSM) prediction in compressive strength of recycled concrete aggregates

Construction and Building Materials, 2019
This study aims at predicting and modeling the 7; 28 and 56 days compressive strength of a concrete containing concrete’s recycled coarse aggregates and that, for different range of cement content and slump.
Abdelkader Hammoudi, K. Moussaceb, Cherif Belebchouche, F. Dahmoune   +3 more
semanticscholar   +1 more source

Size effects on tensile properties and compressive strength of engineered cementitious composites

, 2020
In this study, the size effects on tensile properties and compressive strength of engineered cementitious composites (ECC) were investigated via experimental studies. Plane (2-D) and block (3-D) dogbone-shaped specimens were tested under uniaxial tension
Kequan Yu, Yao Ding, Yixia Zhang
semanticscholar   +1 more source

Effect of nano metakaolin on compressive strength of recycled concrete

, 2020
In order to solve the problem of waste concrete caused by demolition of old buildings, nano metakaolin was added into recycled aggregate concrete to form nano metakaolin recycled concrete. The cube compressive strength test was carried out on it, and the
Xie Jun, Z. Heng, D. Long, Yang Yongzhu, Y. Jie, Doudou Shan, Liu Xinglong, Jingjing Pang, Yueyao Chen, Xu Li, Yannian Zhang   +10 more
semanticscholar   +1 more source

Post-fire compressive strength of recycled PET aggregate concrete reinforced with steel fibers: Optimization and prediction via RSM and GEP

, 2020
A major environmental challenge facing metropolitan areas is recycling and removing waste plastic materials including PET from the environment. On one hand, using waste materials as a substitution for a portion of natural aggregate in concrete has been ...
M. Nematzadeh, Amir Ali Shahmansouri, M. Fakoor   +2 more
semanticscholar   +1 more source

Utilizing recycled aggregate concrete in sustainable construction for a required compressive strength ratio

, 2020
Selecting efficient and economical methods to recycle the original concrete in construction and demolition wastes is regarded as one of the obstacles for construction companies to successfully achieve sustainable development.
Renjie Mi, G. Pan, K. Liew, T. Kuang
semanticscholar   +1 more source

Effects of chemical composition of fly ash on compressive strength of fly ash cement mortar

Construction and Building Materials, 2019
The effect of the chemical composition of the amorphous and crystalline phases of fly ash on the compressive strength of fly ash cement mortar was studied. The fly ash cement mortars were made by replacing 25 wt% of cement with 16 types of fly ashes, and
Young-keun Cho, Sanghwa Jung, Y. Choi
semanticscholar   +1 more source

Modeling the compressive strength of high-strength concrete: An extreme learning approach

Construction and Building Materials, 2019
Compressive strength is a major and significant mechanical property of concrete which is considered as one of the important parameters in many design codes and standards. Early and accurate estimation of it can save in time and cost.
A. K. Al-Shamiri, Joon-Hoon Kim, Tian-Feng Yuan, Y. Yoon   +3 more
semanticscholar   +1 more source