Ultra-High-Performance Concrete (UHPC): A State-of-the-Art Review

Ullah, Rahat; Yuan, Qiang; Ahmad, Jawad; Vatin, Nikolai; El-Shorbagy, M. A.

doi:10.3390/ma15124131

Cited by 53 publications

(22 citation statements)

References 95 publications

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“…It is common knowledge that cement is an expensive substance and that in order to produce it, limestone, a natural resource, must be used [ 7 , 8 , 9 ]. When cement is produced, a pollutant called CO 2 is released in enormous amounts [ 10 , 11 , 12 ]. The availability of energy sources such as coal and oil is declining since they are utilized to make cement.…”

Section: Introductionmentioning

confidence: 99%

A Review on Strength and Durability Properties of Wooden Ash Based Concrete

et al. 2022

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The partial replacement of cement in concrete with other building materials has come to light because of research on industrial waste and sustainable building practices. Concrete is made more affordable by using such components, and it also helps to ease disposal worries. Ash made by burning wood and other wood products is one example of such a substance. Many researchers focused on the utilization of wooden ash (WA) as a construction material. However, information is scattered, and no one can easily judge the impact of WA on concrete properties which restrict its use. Therefore, a details review is required which collect the past and current progress on WA as a construction material. relevant information. This review aims to collect all the relevant information including the general back of WA, physical and chemical aspects of WA, the impact of WA on concrete fresh properties, strength properties, and durability aspects in addition to microstructure analysis. The results indicate the WA decreased the slump and increased the setting time. Strength and durability properties improved with the substitution of WA due to pozzolanic reaction and micro-filling effects. However, the optimum dose is important. Different research recommends different optimum doses depending on source mix design etc. However, the majority of researcher suggests a 10% optimum substitution of WA. The review also concludes that, although WA has the potential to be used as a concrete ingredient but less researchers focused on WA as compared to other waste materials such as fly ash and silica fume etc.

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Section: Introductionmentioning

confidence: 99%

A Review on Strength and Durability Properties of Wooden Ash Based Concrete

et al. 2022

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“…In the other hand, the CO 2 emissions for each powder aforementioned, were obtained through research in several references, and the values obtained were 930 kg-CO 2 /tons, 8 kg-CO 2 /tons, 393 kg-CO 2 /tons by OPC, SF and MK respectively [ 34 , 35 , 36 ].…”

Section: Resultsmentioning

confidence: 99%

Effect of Limestone and Quartz Fillers in UHPC with Calcined Clay

2022

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Ultra-high-performance concrete (UHPC) is a material developed to maximize the engineering characteristics of hydraulic concrete, in terms of durability and mechanical properties, but the adoption of this technology in practice has not turned out as desired, mainly due to the high amounts of cement and silica fume required for its production, and for its consequences on both economic and ecological costs. As an option to improve the impact of UHPC, both on costs and on sustainability, this work evaluates four UHPC series with metakaolin additions of 5%, 10%, 15% and 20%, and the substitution of 37.5% of the Portland cement volume by limestone or quartz filler. The compressive strength, the bulk electrical resistivity and a set of tests for microstructural characterization (TGA, XRD and quantitative EDS) were utilized to better understand the role of calcite on the hydration and pozzolanic reactions in ternary Portland cement-metakaolin-limestone filler. Results indicate that the reaction of calcite is scarce and should be considered as a mere filler, as no increase in AFm phases were found. Nevertheless, the ternary mixture with 15% of metakaolin in addition to cement, and with 37.5% of the Portland cement volume substituted by limestone filler, was the one that presented the best performance in terms of compressive strength and bulk electrical resistivity. The results of the microstructural characterization indicate that the high kaolin content in the metakaolin originated the most significant hydration and pozzolanic reactions development between the ages of 7 and 28 days, as between 28 and 91 the reaction remained dormant. In general, the whole set of results included in this work indicate that limestone filler doesn’t act as a better filler than other kind of powders when used in ternary Portland cement-metakaolin- filler systems.

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“…When the number of freeze–thaw cycles reached 500, the relative dynamic elastic moduli of the UHPCs were 101.1%, 100.9%, and 101.0% for CGS-0.7-0.17-2.0, CGS-0.8-0.18-2.0, and CQS-0.7-0.17-2.0, respectively. This phenomenon can be attributed to the fact that the microstructure of UHPC is very dense and consequently has a low permeability [ 35 , 36 ]. In addition, the water content in UHPC is meager due to its low W/C.…”

Section: Durability Of the Uhpcmentioning

confidence: 99%

Composition Design and Fundamental Properties of Ultra-High-Performance Concrete Based on a Modified Fuller Distribution Model

Xie

Fan²,

Guo³

et al. 2023

Materials

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Both the discrete and continuous particle packing models are used to design UHPC, but the influences of a water film covering the particle surfaces on the compactness of the particle system were not considered in previous research. In fact, the water film results in a certain distance between solid particles (DSP), which affects the compactness of the particle system, especially for cementitious materials with small particle sizes. In the present study, the mixture design method for UHPC was proposed based on the Fuller distribution model modified using the DSP. Then, the components of cementitious materials and aggregates were optimized, and the UHPC matrices with high solid concentrations were obtained. The results showed that the solid concentration, slump flow, and compressive strength of the UHPC matrix reached 77.1 vol.%, 810 mm, and 162.0 MPa, respectively. By replacing granulated blast furnace slag (GBFS) with quartz powder (QP), the flexural strength of the UHPC matrix was increased without reducing its compressive strength. When the steel fiber with a volume fraction of 1.5% was used, the slump flow, compressive strength, tensile strength, and flexural strength of the UHPC reached 740 mm, 175.6 MPa, 9.7 MPa, and 22.8 MPa, respectively. After 500 freeze–thaw cycles or 60 dry–wet cycles under sulfate erosion, the mechanical properties did not deteriorate. The chloride diffusion coefficients in UHPCs were lower than 3.0 × 10−14 m2/s, and the carbonation depth of each UHPC was 0 mm after carbonization for 28 days. The UHPCs presented ideal workability, mechanical properties, and durability, demonstrating the validity of the method proposed for UHPC design.

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Ultra-High-Performance Concrete (UHPC): A State-of-the-Art Review

Cited by 53 publications

References 95 publications

A Review on Strength and Durability Properties of Wooden Ash Based Concrete

A Review on Strength and Durability Properties of Wooden Ash Based Concrete

Effect of Limestone and Quartz Fillers in UHPC with Calcined Clay

Composition Design and Fundamental Properties of Ultra-High-Performance Concrete Based on a Modified Fuller Distribution Model

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