Influence of Applied Loads on the Permeability Behavior of Ultra High Performance Concrete with Steel Fibers

Ma, Zhiming; Zhao, Tong; Xiaochuan, Yao

doi:10.3151/jact.14.770

Cited by 19 publications

(11 citation statements)

References 25 publications

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“…9, showing a good linear relation between COD res and COD load for each fibre content. A similar trend was already observed by Ma et al (2016). Furthermore, lower COD res values were found with the increase of fibre content, for equivalent COD load .…”

Section: Crack Pattern Characterisationsupporting

confidence: 89%

“…The number of microcracks and new pores increase with the increase of applied tensile loading, and they provide passageways for water penetration into UHPC. The increase of the maximum amount of absorbed water is not very significant when the applied tensile stress is below 50% of ultimate tensile stress; however, it becomes noticeable when the applied tensile stress reaches 80% of ultimate tensile stress (Ma et al 2016).…”

Section: Introductionmentioning

confidence: 84%

“…In that case, the localised macro-crack within the specimens acts as a large artificial capillary pore, which increases the absorption capacity of the material considerably. Ma et al (2016) used dumbbell-shaped UHPFRC specimens in which uniaxial tensile stress of 0%, 30%, 50% and 80% percentages of ultimate tensile stress were applied. Then, specimens were unloaded, and the capillary absorption test was carried out.…”

Section: Introductionmentioning

confidence: 99%

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Capillary Transport of Water in Cracked and Non-cracked UHPFRC Specimens

Matos

Nunes

Aguiar

2019

ACT

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The primary goal of the present paper is to investigate the influence of cracking on water transport by capillary suction of UHPFRC. Prismatic specimens were firstly loaded under four-point bending up to specific crack open displacement (COD). Target COD, under loading, was varied between 200 and 400 μm, in steps of 50 μm. After unloading, a COD recovery was observed with residual COD ranging between 116-334 µm and 75-248 μm for UHPFRC-1.5% and UHPFRC-3.0% specimens, respectively. The crack pattern created was characterised (number of cracks and crack width) before capillarity testing. Sorptivity results of cracked UHPFRC-1.5% and UHPFRC-3% specimens remained in the range of 0.024 to 0.044 mg/(mm 2 .min 0.5), which are about 2 to 4 times higher than the sorptivity results of noncracked UHPFRC specimens. However, the maximum sorptivity observed on cracked UHPFRC is relatively low as compared to typical sorptivity results found in good quality conventional concrete or engineered cementitious composites (ECC).

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Section: Crack Pattern Characterisationsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

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Capillary Transport of Water in Cracked and Non-cracked UHPFRC Specimens

Matos

Nunes

Aguiar

2019

ACT

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“…Finally, the chloride content in concrete was determined, which could well quantify the effects of the concentration gradient and convection on chloride migration in concrete. test of chloride ion content in concrete (JGJ/T322-2013), the free chloride content was determined by the method of chemical titration [27][28][29]. Specimens after chloride attack test were dried completely in an air-drying oven until reaching a constant weight (50°C, approximately 7 d).…”

Section: Test For Chloride Migration With the Coupling Of Watermentioning

confidence: 99%

Chloride Penetration into Concrete under the Coupling Effects of Internal and External Relative Humidity

Fang

Ming-min

2020

Advances in Civil Engineering

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Chloride penetration frequently happens in an unsaturated concrete; in this case, the chloride migration is under the coupling effects of internal moisture and external relative humidity (RH). Various chloride attack tests were designed in this paper to investigate the effects of internal moisture and external RH (50–100%) on the chloride penetration into an unsaturated concrete, and the chloride content was determined to quantify the chloride migration in concrete. The results highlighted that there was a good correlation between the chloride penetration into concrete and its internal RH. The chloride ion was difficult to penetrate into concrete when its internal RH was below 50%; however, the chloride penetration rate increased when the internal RH of concrete was above 75%, and the chloride migration increased with increasing RH and exposure duration. Water evaporation in concrete increased with decreasing external RH, and an obvious increase in the surface chloride content may be observed when external RH was 50%; however, when external RH was above 75%, the inner chloride content increased and surface chloride content decreased with increasing exposure duration. Simulating the chloride penetration under wet-dry cycling, the water migration resulted in an increase in the surface chloride content and a decrease in the inner chloride content, and the chloride crystal precipitated on the surface of concrete with a high w/c ratio.

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“…Fujikake et al (2006aFujikake et al ( , 2006bFujikake et al ( , 2006c proposed nonlinear analysis for a beam based on rapid tensile and bending test results. Ma et al (2016) investigated the relationship between applied load and permeability of UFC. Sugano et al (2007) indicated the applicability of UFC to earthquake resistant structures based on cyclic loading tests of a pier model.…”

Section: Introductionmentioning

confidence: 99%

Impact-Resistant Behavior of Steel-Fiber-Reinforced Porosity-Free Concrete Beam

Kurihashi

Kono²,

Komuro

2020

ACT

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Porosity-free concrete (PFC) is a newly developed ultra-high-strength concrete with a compressive strength of 400 MPa. PFC reduces the weight of bridge superstructures, protects against collisions with flying objects, increases seismicresistant capacity, and improves long-term durability. At present, basic material properties of PFC, such as compressive strength, tensile strength, and tensile toughness have been revealed. However, impact resistance has not been examined. In this study, in order to investigate the impact-resistant behavior of steel-fiber-reinforced PFC, falling-weight impactloading tests were conducted on a PFC beam, considering the mixing ratio of steel fiber and the height of falling-weight as variables. To investigate the effects of compressive strength on the impact-resistant behavior of the concrete beam, tests using high-strength concrete (HC) with a compressive strength of 100 MPa were also conducted as general highstrength concrete. From this experimental study, the following results were obtained: 1) impact resistance capacity of the PFC beam can be more drastically improved by mixing 2 vol.% of steel fiber compared to the HC beam; 2) bonding resistance between PFC and steel fiber could play an important role in upgrading the impact resistance. PFC mixed with 2 vol.% steel fiber could be used as an effective reinforcement material for impact protection structures.

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Influence of Applied Loads on the Permeability Behavior of Ultra High Performance Concrete with Steel Fibers

Cited by 19 publications

References 25 publications

Capillary Transport of Water in Cracked and Non-cracked UHPFRC Specimens

Capillary Transport of Water in Cracked and Non-cracked UHPFRC Specimens

Chloride Penetration into Concrete under the Coupling Effects of Internal and External Relative Humidity

Impact-Resistant Behavior of Steel-Fiber-Reinforced Porosity-Free Concrete Beam

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