Bond strength and corrosion behavior of rebar embedded in straw ash concrete

Zhang, Qiang; Li, Yaozhuang; Xu, Lei; Lun, Peiyuan

doi:10.1016/j.conbuildmat.2019.01.228

Cited by 22 publications

(8 citation statements)

References 14 publications

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“…Zhang et al [104] carried out the incorporation of straw ash into reinforced concrete structures to study the compressive strength and corrosion resistance of concrete. The schematic diagram of the test is shown in Fig.…”

Section: Application In Concretementioning

confidence: 99%

“…Luo et al [107] used grape cuttings as the main raw material for cultivating oyster mushrooms, and used the method of bottle planting to prepare 7 formulas for cultivating oyster mushrooms by changing the proportion of grape cuttings in the medium. The test results showed that the different contents of grape Figure 14: Microstructure of straw ash concrete [104] twigs had different effects on the growth rate and biological efficiency of oyster mushroom mycelium. The mushrooms cultivated have the best taste, the highest yield, and the biological efficiency can reach 89.5% when the raw materials are 78% grape branches, 20% bran, 1% gypsum and 1% superphosphate.…”

Section: Application Of Oyster Mushroom Cultivationmentioning

confidence: 99%

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Research and Application Progress of Straw

Chen¹,

Mohrmann²,

Li³

et al. 2023

Journal of Renewable Materials

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Straw is a general term for the stem and leaf parts of mature crops, and is a multi-purpose renewable biomass energy resource in the agricultural ecosystem. The prospect of comprehensive utilization of straw has become broad with the development of agricultural production, the advancement of science and technology, and the improvement of the level of agricultural mechanization. The comprehensive utilization of straw plays an important role in enhancing the sustainable development ability of agricultural economy and improving the current situation of comprehensive utilization of agricultural resources in my country. This paper briefly combs the development history of straw and the prospect and current situation of comprehensive utilization, and expounds the separation technology of straw components, straw man-made panels, straw concrete, straw returning technology and oyster mushroom cultivation. It focuses on the description of the component separation technology of straw and the manufacturing process of straw-based panels. The different separation methods and separation effects of cellulose, hemicellulose and lignin were introduced in detail, and the static yield strength (MOR), internal bonding strength (IB) and water absorption thickness of several common straw-based panels were compared and studied (TS). Finally, it summarizes the benefit analysis of the comprehensive utilization of straw by scholars from the perspective of economics, and summarizes the corresponding measures based on their own views.

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Section: Application In Concretementioning

confidence: 99%

Section: Application Of Oyster Mushroom Cultivationmentioning

confidence: 99%

Research and Application Progress of Straw

Chen¹,

Mohrmann²,

Li³

et al. 2023

Journal of Renewable Materials

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“…The internal porosity of concrete increases as the replacement ratio of recycled aggregate increases, so the thermal conductivity of concrete in this case decreased as the recycled coarse aggregate replacement ratio increased. The straw fiber contains honeycomb pores and mainly comprises substances such as lignin and cellulose, which are poor conductors of heat [38]. This resulted in better insulation performance.…”

Section: Range Analysismentioning

confidence: 99%

“…Fly ash The straw fiber contains honeycomb pores and mainly comprises substances such as lignin and cellulose, which are poor conductors of heat [38]. This resulted in better insulation performance.…”

Section: Fly Ash (%)mentioning

confidence: 99%

“…The NaOH-treated straw fiber concrete had a higher density, lower porosity, higher compressive strength, higher splitting tensile strength, and higher flexural strength than untreated straw fiber. Zhang [38] investigated the addition of straw ash instead of cement for preparing straw ash concrete. After replacing the cement with the straw ash admixture, the compactness of concrete is improved.…”

Section: Introductionmentioning

confidence: 99%

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Research on the Performance of Recycled-Straw Insulating Concrete and Optimization Design of Matching Ratio

Deng

Xiao

et al. 2023

Sustainability

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Construction solid waste and agricultural waste, as renewable resources, have gained increasing attention recently. This research aims to explore the mechanical and thermal properties of recycled-straw insulating concrete commonly made with construction waste and straw in northern Fujian, which can provide useful suggestions for the practical use of recycled-straw insulating concrete. The effects of recycled coarse aggregate, fly ash, and straw on the mechanical and thermal properties of recycled-straw insulating concrete were investigated by orthogonal tests. The results of the orthogonal tests were optimized by the total efficacy coefficient method to obtain the optimal mix ratio of recycled-straw insulating concrete. Combined with the finite element analysis software ANSYS Workbench, the heat transfer performance of the recycled-straw insulating concrete walls was analyzed to simulate the insulation performance of the walls. The compressive strength of the recycled-straw insulating concrete with the optimal ratio was found to be 30.93 MPa, and the thermal conductivity was 0.5051 W/(m·K). The steady-state thermal analysis of the recycled-straw insulating concrete wall and the plain concrete wall was carried out by finite element software, and the simulation results showed that the insulation performance of the recycled-straw insulating concrete walls was improved by 145% compared with the plain concrete wall. These results indicate that the recycled-straw insulating concrete wall has better thermal insulation performance and can be applied to building envelopes to save heating costs in winter and reduce carbon dioxide emissions, which has significant economic and environmental significance for areas with low outdoor temperatures in winter and long heating periods.

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