High-Performance Construction Materials: Latest Advances and Prospects

Wang, Lei; Tang, Shengwen

doi:10.3390/buildings12070928

Cited by 4 publications

(4 citation statements)

References 15 publications

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“…In recent years, low-heat portland cement has been used to lower the cement hydration heat in an attempt to reduce the risk of thermal cracking. To improve the mechanical properties and microstructure of concrete, nanomaterials, such as silica fume, have been adopted [50]. In this study, a series of concrete composites with silica aerogel admix were manufactured and tested.…”

Section: Discussionmentioning

confidence: 99%

Mechanical and Thermal Properties of an Energy-Efficient Cement Composite Incorporating Silica Aerogel

Koriakovtseva,

Dontsova,

Nemova

2024

Buildings

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The thermal performance of the building envelope is significant in energy-efficient construction. Because concrete is widely used in civil engineering, options to reduce its R-value should be considered. This study explores the thermal and structural properties of aerogel-enhanced concrete. Silica aerogel powder was mixed with fine-grained concrete at 15 vol.%. Two series of samples were prepared to identify the preferred technology. The first series of samples were mixed without isopropyl alcohol; for the second series, the alcohol was mixed with silica aerogel before mixing into the dry mix. The thermal conductivity, compressive strength, and bending resistance of the specimens were measured. The presence of silica aerogel admix resulted in a decrease in the compressive strength of the specimens by 30% compared with that of the reference samples and a reduction in the bending strength of the samples by 9% compared with that of the reference samples. For the first and second series of samples, the K-values of the aerogel-enhanced specimens varied in the range from 0.83 W/(m·K) to 1.13 W/(m·K), respectively. To further decrease the thermal conductivity, gypsum putty was then added to the specimens, resulting in the K-values further decreasing to 0.64 W/(m·K) and 0.84 W/(m·K), respectively. The calculation of heat losses through 1 m2 of the aerogel-enhanced concrete wall was performed. It has been shown that energy expenses for heating can be lowered by 30%. The calculation of the greenhouse gas emissions from the combustion of fuel required for heating was also considered. The emissions decreased by 30.2% compared with the reference sample. Microscopic examination of the face and section surfaces of the sample revealed a significant number of pores compared with conventional fine-grain concrete.

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Section: Discussionmentioning

confidence: 99%

Mechanical and Thermal Properties of an Energy-Efficient Cement Composite Incorporating Silica Aerogel

Koriakovtseva,

Dontsova,

Nemova

2024

Buildings

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“…Over the last three decades, the production of engineering materials that are simultaneously lightweight, durable, and strong has emerged as a captivating subject of interest in both academic and industrial realms [1,2]. Aluminum matrix composites (AMCs) have shown great potential in achieving these tailored properties due to their cost-effective construction, high strength-toweight ratio, excellent castability, weldability, and wear properties [3,4].…”

Section: Introductionmentioning

confidence: 99%

CHARACTERIZATION OF Al 6061/Al2O3/SiC COMPOSITES WITH CERIUM OXIDE: CORROSION ANALYSIS AND MICROSTRUCTURAL INSIGHTS

Sharma,

Kumar,

Kumar

et al. 2024

CTP

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The aim of this research is to examine the corrosion characteristics of Al 6061/Al2O3/SiC composites when cerium oxide (CeO2) is incorporated, employing electrochemical analysis and scanning electron microscopy (SEM) techniques. This study investigated the impact of cerium oxide on the corrosion behavior and assessed the hydrophobic properties of the composite surface in corrosive environments using contact angle measurements. The experimental methodology comprised several key components, like the selection of specific materials, the production of hybrid composites by the stir casting technique, the analysis of corrosion using the potentiodynamic polarization method, and the characterization of surface wettability. The metallographic analysis of the composites provided insights into the impact of various reinforcements on the microstructural properties. The incorporation of cerium oxide served to mitigate agglomeration and augment grain refinement within the composites. The utilization of potentiodynamic polarization analysis revealed enhanced corrosion resistance in hybrid composites containing cerium oxide in comparison to the Al 6061 alloy. The corrosion current density exhibited a decrease as the content of CeO2 increased. The findings indicate that cerium oxide can effectively prevent corrosion in aluminum hybrid composites. These composites show potential for use in corrosion-prone applications.

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“…Adding fibers to the mix design of LCC and lime-stabilized soils is considered to be a cost-effective and environmentally friendly method to improve ductility performance [26]. Fibers have a wide application in various fields of engineering [27][28][29]. The application of fibers as soil reinforcement with or without cement has been reported previously [30][31][32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Polyamide Fiber-Reinforced Lime–Cement Concrete

et al. 2023

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Lime–cement concrete (LCC) is a type of lime-based concrete in which lime and cement are utilized as the main binding agents. This type of concrete has been extensively used to construct support layers for shallow footings and road backfills in some warm regions. So far, there has been no systematic research conducted to investigate the mechanical characteristics of polyamide fiber-reinforced LCC. To address this gap, LCC specimens were prepared with 0%, 0.5%, 1%, and 2% of polyamide fibers (a synthetic textile made of petroleum-based plastic polymers). Specimens were then cured for 3, 7, and 28 days at room and oven temperatures. Then, the effects of the fibers’ contents, curing conditions, and curing periods on the mechanical characteristics of LCC, such as secant modulus, deformability index, bulk modulus, shear modulus, stiffness ratio, strain energy, failure strain, strength ratio, and failure patterns, was investigated. The results of the unconfined compressive strength (UCS) tests showed that specimens with 1% fiber had the highest UCS values. The curing condition and curing period had significant effects on the strength of the LCC specimens, and oven-cured specimens developed higher UCS values. The aforementioned mechanical properties of the LCC specimens and the ability of the material to absorb energy significantly improved when the curing period under the oven-curing condition was increased, as well as through the application of fibers in the mix design. Based on the test results, a simple mathematical model was also established to forecast the mechanical properties of fiber-reinforced LCC. It is concluded that the use of polyamide fibers in the mix design of LCC can both improve mechanical properties and perhaps address the environmental issues associated with waste polyamide fibers.

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High-Performance Construction Materials: Latest Advances and Prospects

Abstract: Our civilization has used construction materials extensively, especially for infrastructure projects [...]

Cited by 4 publications

References 15 publications

Mechanical and Thermal Properties of an Energy-Efficient Cement Composite Incorporating Silica Aerogel

Mechanical and Thermal Properties of an Energy-Efficient Cement Composite Incorporating Silica Aerogel

CHARACTERIZATION OF Al 6061/Al2O3/SiC COMPOSITES WITH CERIUM OXIDE: CORROSION ANALYSIS AND MICROSTRUCTURAL INSIGHTS

Mechanical Properties of Polyamide Fiber-Reinforced Lime–Cement Concrete

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