Improvement of intrinsic self-healing ability of concrete by adjusting aggregate gradation and sand ratio

Wang, Jinbang; Sun, Hao; Yu, Linyu; Liu, Shuai; Geng, Dongjian; Yuan, Liang; Zhou, Zhen; Cheng, Xin; Du, Peng

doi:10.1016/j.conbuildmat.2021.124959

Cited by 9 publications

(2 citation statements)

References 50 publications

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“…The aggregate particle size distribution indicates the proportion of aggregates with different particle size ranges relative to the total aggregate quality. The particle size distribution affects the slump, expansion, consistency, bleeding rate, and other performances of concrete mixtures [ 27 , 28 ], as well as the mechanical properties [ 29 ] and durability [ 30 ] of concrete. In accordance with GB/T 17431.1-2010 [ 31 ], the coarse aggregates used in this experiment were screened and analysed to obtain the gradation of the coral aggregates, as shown in Figure 2 .…”

Section: Methodsmentioning

confidence: 99%

Effect of Superfine Cement Modification on Properties of Coral Aggregate Concrete

et al. 2023

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In marine engineering, using corals as aggregates to prepare concrete can reduce both the exploitation of stones and the transportation cost of building materials. However, coral aggregates have low strength and high porosity, which may affect the workability and mechanical properties of concrete. Hence, superfine cement is used innovatively in this study to modify coral aggregates; additionally, the effects of the water–cement ratio and curing time on the water absorption and strength of modified coral aggregates are investigated. Modified coral aggregate concrete is prepared, and the effect of using modified superfine cement on its workability and strength is investigated. Experimental results show that when the water-cement ratio exceeds 1.25, the slurry does not form a shell on the surface of the coral aggregates and the water absorption of the coral aggregates increases significantly. The strength of the modified coral aggregates cured for a short duration is slightly lower than that of unmodified coral aggregates, whereas that cured for 28 days is approximately 20% higher than that of unmodified coral aggregates. Using superfine cement to modify coral aggregate concrete can improve its workability, but not its compressive properties.

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Section: Methodsmentioning

confidence: 99%

Effect of Superfine Cement Modification on Properties of Coral Aggregate Concrete

et al. 2023

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“…Moreover, under the actions of adverse factors such as environmental changes, external loads, and construction, concrete structures inevitably produce damage accumulation and resistance attenuation damage and even lead to catastrophic accidents [ 5 ]. Therefore, the vulnerable parts of the structure should possess multi-functions (real-time health monitoring [ 6 ], self-regulation [ 7 ], self-protection [ 8 ], and so on), such that as a result, the structure can display early warning signs before major disaster events, which is also a research hotspot for scholars around the world.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Properties and Applications of Carbon Fiber-Reinforced Smart Cement-Based Composites

Hao

Shi

et al. 2023

Materials

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Under the strategies of low-carbon and environmental protection, promoting green technology innovation to achieve carbon neutrality in the construction field has become a universal goal. As the building material with the highest consumption, concrete has gradually begun to transform into a multi-functional and intelligent product. Therefore, the research on carbon fiber-reinforced cement-based composites (CFRCs) is of relative interest. It mainly uses carbon fibers (CFs) with high elasticity, strength, and conductivity to disperse evenly into the concrete as a functional filler, to achieve the intelligent integration of concrete structures and function innovatively. Furthermore, the electrical conductivity of CFRC is not only related to the content of CFs and environmental factors but also largely depends on the uniform dispersion and the interfacial bonding strength of CFs in cement paste. This work systematically presents a review of the current research status of the enhancement and modification mechanism of CFRC and the evaluation methods of CF dispersion. Moreover, it further discusses the improvement effects of different strengthening mechanisms on the mechanical properties, durability, and smart properties (thermoelectric effect, electrothermal effect, strain-sensitive effect) of CFRC, as well as the application feasibility of CFRC in structural real-time health monitoring, thermal energy harvesting, intelligent deformation adjustment, and other fields. Furthermore, this paper summarizes the problems and challenges faced in the efficient and large-scale applications of CFRCs in civil engineering structures, and accordingly promotes some proposals for future research.

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A review on autogenous self-healing behavior of ultra-high performance fiber reinforced concrete (UHPFRC)

Yao

Shen

Guo

et al. 2022

Archiv.Civ.Mech.Eng

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Improvement of intrinsic self-healing ability of concrete by adjusting aggregate gradation and sand ratio

Cited by 9 publications

References 50 publications

Effect of Superfine Cement Modification on Properties of Coral Aggregate Concrete

Effect of Superfine Cement Modification on Properties of Coral Aggregate Concrete

Recent Advances in Properties and Applications of Carbon Fiber-Reinforced Smart Cement-Based Composites

A review on autogenous self-healing behavior of ultra-high performance fiber reinforced concrete (UHPFRC)

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