Mechanical Properties and Environmental Evaluation of Ultra-High-Performance Concrete with Aeolian Sand

Chu, Hsin; Wang, Fengjuan; Wang, Liguo; Feng, Tian; Wang, Danqian

doi:10.3390/ma13143148

Cited by 20 publications

(8 citation statements)

References 48 publications

(77 reference statements)

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“…Therefore, the optimum concentration of GO to be mixed in RS-UHPC is 0.05 wt.%, from the perspective of the elastic modulus. The elastic modulus of the RS-UHPC sample prepared in this study ranged from 41.96 to 47.10 GPa, which exceeds the value for UHPC prepared from recycled sand [ 58 ] and is comparable to that for UHPC prepared from river sand [ 59 ], but is slightly lower than that of UHPC produced by Aeolian sand [ 60 ]. Ordinary concrete is generally composed of aggregates, a cement slurry, and an interface transition zone.…”

Section: Resultsmentioning

confidence: 67%

Effect of Graphene Oxide on Mechanical Properties and Durability of Ultra-High-Performance Concrete Prepared from Recycled Sand

et al. 2020

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Ultra-high-performance concrete (UHPC) has been used as an advanced construction material in civil engineering because of its excellent mechanical properties and durability. However, with the depletion of the raw material (river sand) used for preparing UHPC, it is imperative to find a replacement material. Recycled sand is an alternative raw material for preparing UHPC, but it degrades the performance. In this study, we investigated the use of graphene oxide (GO) as an additive for enhancing the properties of UHPC prepared from recycled sand. The primary objective was to investigate the effects of GO on the mechanical properties and durability of the UHPC at different concentrations. Additionally, the impact of the GO additive on the microstructure of the UHPC prepared from recycled sand was analysed at different mixing concentrations. The addition of GO resulted in the following: (1) The porosity of the UHPC prepared from recycled sand was reduced by 4.45–11.35%; (2) the compressive strength, flexural strength, splitting tensile strength, and elastic modulus of the UHPC prepared from recycled sand were enhanced by 8.24–16.83%, 11.26–26.62%, 15.63–29.54%, and 5.84–12.25%, respectively; (3) the resistance of the UHPC to penetration of chloride ions increased, and the freeze–thaw resistance improved; (4) the optimum mixing concentration of GO in the UHPC was determined to be 0.05 wt.%, according to a comprehensive analysis of its effects on the microstructure, mechanical properties, and durability of the UHPC. The findings of this study provide important guidance for the utilisation of recycled sand resources.

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Section: Resultsmentioning

confidence: 67%

Effect of Graphene Oxide on Mechanical Properties and Durability of Ultra-High-Performance Concrete Prepared from Recycled Sand

et al. 2020

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“…Cement is one of the three main materials, and it has an irreplaceable position in the current construction industry [ 1 ]. With the rapid development of infrastructure and real estate in our country, the demand for cement is also increasing.…”

Section: Introductionmentioning

confidence: 99%

Effect of Aeolian Sand Powder Addition on Frost Resistance of Concrete Pavement

Zhao

Deng

2022

International Journal of Analytical Chemistry

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In order to solve the problem of exploring the freeze-thaw characteristics of modified aeolian sand mixed with cement and silt, the authors propose a freeze-thaw cycle test of modified aeolian sand under the condition of mixing 5% cement and silt with different contents. In this experiment, under freeze-thaw conditions, its intensity decay and mass volume change law and the changes of freeze-thaw characteristics were comprehensively characterized by multiple indicators. The result shows that, after two freeze-thaw cycles, the compressive strength and peak strain of the improved aeolian sand were positively correlated with the silt content. With the increase of the number of freeze-thaw cycles, the compressive and antidestruction capacity of the improved aeolian sand with high silt content and low silt content decreased significantly. 15% silt content improves the structural stability of aeolian sand. It is proved that the authors’ experiment can intuitively and effectively reflect the change law of soil strength after freezing and thawing of such improved aeolian sandy soil, which has displayed significance.

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“…Concrete durability could be assessed in a few aspects, including testing of carbonation, frost resistance or testing of resistance to chloride penetration. HPC possesses increased durability thanks to its compact microstructure [9,10]. High frost resistance [11], carbonation resistance [12,13] and chloride resistance [14,15] were proved in a few research tasks.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of High-Performance Concrete Characteristics and Loading Test of Pretensioned Experimental Beams

2021

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High-performance concrete (HPC) is subjected to wide attention in current research. Many research tasks are focused on laboratory testing of concrete mechanical properties with specific raw materials, where a mixture is prepared in a relatively small amount in ideal conditions. The wider utilization of HPC is connected, among other things, with its utilization in the construction industry. The paper presents two variants of HPC which were developed by modification of ordinary concrete used by a precast company for pretensioned bridge beams. The presented variants were produced in industrial conditions using common raw materials. Testing and comparison of basic mechanical properties are complemented with specialized tests of the resistance to chloride penetration. Tentative expenses for normal strength concrete (NSC) and HPC are compared. The research program was accomplished with a loading test of model experimental pretensioned beams with a length of 7 m made of ordinarily used concrete and one variant of HPC. The aim of the loading test was to determine the load–deformation diagrams and verify the design code load capacity calculation method. Overall, the article summarizes the possible benefits of using HPC compared to conventional concrete.

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Mechanical Properties and Environmental Evaluation of Ultra-High-Performance Concrete with Aeolian Sand

Cited by 20 publications

References 48 publications

Effect of Graphene Oxide on Mechanical Properties and Durability of Ultra-High-Performance Concrete Prepared from Recycled Sand

Effect of Graphene Oxide on Mechanical Properties and Durability of Ultra-High-Performance Concrete Prepared from Recycled Sand

Effect of Aeolian Sand Powder Addition on Frost Resistance of Concrete Pavement

Comparative Study of High-Performance Concrete Characteristics and Loading Test of Pretensioned Experimental Beams

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