Design of Fiber-Reinforced DSP Mixes for Minimum Brittleness

Lange-Kornbak, D.; Karihaloo, Bhushan Lal

doi:10.1016/s1065-7355(97)00057-6

Cited by 17 publications

(6 citation statements)

References 12 publications

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“…Tests showed that the mixture has a smaller strain hardening region than expected. [6][7][8] This is attributed to the reduced number of microcracks formed in the material prior to the formation of a macrocrack.…”

Section: Discussionmentioning

confidence: 99%

CARDIFRC^® – Development and mechanical properties. Part III: Uniaxial tensile response and other mechanical properties

Benson

Karihaloo

2005

Magazine of Concrete Research

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Part III of this three-part paper about CARDIFRC 1 , a class of high performance short steel fibre-reinforced cementitious composites (HPFRCCs), deals with the measurement of the tensile response of CARDIFRC 1 mixes on a specially developed specimen geometry and loading arrangement. It also compares the measured mechanical properties (Young's modulus, E, compressive strength, f c , tensile strength, f t , specific fracture energy, G F ) with the theoretically predicted values using micromechanical relations.

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Section: Discussionmentioning

confidence: 99%

CARDIFRC^® – Development and mechanical properties. Part III: Uniaxial tensile response and other mechanical properties

Benson

Karihaloo

2005

Magazine of Concrete Research

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“…The increase of the compressive strength and tensile strength of concrete is the most famous function of SF, the elastic modulus and flexural strength of cement mortar are also improved [19,20]. The DSP (Densified Systems containing homogeneously arranged ultra-fine Particles) material developed by SF has a compressive strength of 100 MPa at 28 days, which is 3-5 times the strength of conventional concrete [21]. Pozzolanic materials react with calcium hydroxide (CH) to form a calcium silicate hydrate gel (CSH), and CSH provides a less corrosive environment, which helps to improve the durability of composite materials and makes it dense [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Strength Characteristics and Microstructure of Cement Stabilized Soft Soil Admixed with Silica Fume

Jiang

Wang

et al. 2021

Materials

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Soft soil improvement is an important subject in civil engineering, and searching for an effective admixture is an important research. Silica fume (SF) is a kind of recycled material, it can be used in engineering as a pozzolanic material. The main objective of this study is to assess the effectiveness of industrial waste silica fume (SF) as an admixture to improve the cement stabilized soft soil. The unconfined compressive test (UCT) and scanning electron microscopy (SEM) test of cement stabilized soil with different SF contents and different curing times have been carried out. UCT after 28 days revealed that the addition of SF can effectively increase the strength of cement stabilized soil and reduce the amount of cement, and 1.5% SF content is considered optimum, excessive SF will not further increase the strength. SF helped to accelerate the cement hydration reaction and significantly improve the early-age strength of stabilized soil even at 3 days, which can improve construction efficiency in actual projects. SEM analyses shows that the proper SF content could make the hydration product calcium silicate hydrate gel (CSH) fill the pores and increase the strength of the material, but excessive SF will increase the large pores content of the material and reduce the strength. This provided a basis for application of SF in improving soft soil.

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“…The higher stress intensity factor in conventional coarse aggregate concrete compared to UHPC is explained by more than 2 times higher volume content of aggregate. The aggregate particles increase the critical stress intensity factor by inhibiting or deflecting the microcracks formed during loading [64]. In addition, the porous contact zone further reduces the stress intensity near the crack tip.…”

Section: Critical Stress Intensity Factormentioning

confidence: 99%

The Effects of Corrugated Steel Fiber on the Properties of Ultra-High Performance Concrete of Different Strength Levels

Soloviev,

Matiushin

2023

Buildings

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This article describes the influence of corrugated steel fiber on the mechanical properties and fracture energy of Ultra-High Performance Concretes (UHPC) of various strength levels. Three UHPC formulations with compressive strengths of 143, 152, and 177 MPa were tested. The following parameters for the formulations without fiber and those containing 2% steel fiber by volume were determined: compressive strength, splitting tensile strength, flexural strength, modulus of elasticity, Poisson’s ratio and critical stress intensity factor. From the axial tensile test results, the following parameters were obtained: the cracking stress, tensile strength, and fracture energy of Ultra-High Performance Fiber Reinforced Concrete (UHPFRC) of different strength levels. With the introduction of steel fiber, an increase in all the investigated parameters is observed regardless of the strength of the concrete matrix. The most remarkable influence the fiber has on the splitting tensile strength, flexural strength and critical stress intensity coefficient, the increase is up to 1.6–3.2 times. There was a slight increase in compressive strength and elastic modulus—up to 5.0–7.4% depending on the composition. Poisson’s ratio was equal to 0.2 regardless of the strength of the concrete matrix and the presence of steel fiber. Based on the test results, equations were proposed to predict the properties of UHPC and UHPFRC depending on the water–cement ratio, silica fume content, cement compressive strength and the volumetric content of corrugated steel fiber. The calculated and experimental values showed good convergence with a correlation coefficient in the range of 0.885–0.997.

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Design of Fiber-Reinforced DSP Mixes for Minimum Brittleness

Cited by 17 publications

References 12 publications

CARDIFRC^® – Development and mechanical properties. Part III: Uniaxial tensile response and other mechanical properties

CARDIFRC^® – Development and mechanical properties. Part III: Uniaxial tensile response and other mechanical properties

Strength Characteristics and Microstructure of Cement Stabilized Soft Soil Admixed with Silica Fume

The Effects of Corrugated Steel Fiber on the Properties of Ultra-High Performance Concrete of Different Strength Levels

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Design of Fiber-Reinforced DSP Mixes for Minimum Brittleness

Cited by 17 publications

References 12 publications

CARDIFRC® – Development and mechanical properties. Part III: Uniaxial tensile response and other mechanical properties

CARDIFRC® – Development and mechanical properties. Part III: Uniaxial tensile response and other mechanical properties

Strength Characteristics and Microstructure of Cement Stabilized Soft Soil Admixed with Silica Fume

The Effects of Corrugated Steel Fiber on the Properties of Ultra-High Performance Concrete of Different Strength Levels

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Product

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CARDIFRC^® – Development and mechanical properties. Part III: Uniaxial tensile response and other mechanical properties

CARDIFRC^® – Development and mechanical properties. Part III: Uniaxial tensile response and other mechanical properties