Investigating porous concrete with improved strength: Testing at different scales

Ozbek, A.S. Agar; Weerheijm, J.; Schlangen, Erik; Breugel, K. van

doi:10.1016/j.conbuildmat.2012.12.040

Cited by 101 publications

(38 citation statements)

References 23 publications

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“…The volume distribution is shown in Figure 10, and the statistical data are listed in Table 4. The mean volume is 0.96 mm 3 , only 1/40 of the aggregates, and the mean equivalent diameter is 0.72 mm. The calculated aggregate and void distribution datasets can be used for generating random concrete structures [15,30].…”

Section: Mesoscale Structure Characterisationmentioning

confidence: 99%

“…Figure 9 shows the volume distribution of aggregates with statistical data summaries in Table 3. The majority of aggregate volumes (i.e., 81%, 84 out of 103) has the size between 1 and 60 mm 3 with a mean value of 39 mm 3 . The mean length and width are 7.37 mm and 2.74 mm, respectively.…”

Section: Mesoscale Structure Characterisationmentioning

confidence: 99%

“…Recent advances in imaging techniques, especially the 3D micro X-ray computed tomography (XCT) technique, have made it possible to characterise microstructures for various composite materials with high resolution but without destruction of the materials. For example, it has been applied to characterisation of steel fibres in self-compacting concrete [2], measurement of porosity and aggregate properties in porous concrete [3], shape and surface analyses of coarse aggregates in normal and lightweight concrete [4,5], and evaluation of microarchitectures of limestone and trabecular bones [6]. In situ XCT tests, which scan 3D internal microstructures under progressive loading and environmental factors so that the structural damage and fracture evolution can be examined in relation to external factors, have also been rapidly Figure 2: Propagation of internal microcracks in a CT slice as the load increases.…”

Section: Introductionmentioning

confidence: 99%

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Three‐Dimensional In Situ XCT Characterisation and FE Modelling of Cracking in Concrete

et al. 2018

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Three-dimensional (3D) characterisation and modelling of cracking in concrete have been always of great importance and interest in civil engineering. In this study, an in situ microscale X-ray computed tomography (XCT) test was carried out to characterise the 3D microscale structure and cracking behaviour under progressive uniaxial compressive loading. The 3D cracking and fracture behaviour including internal crack opening, closing, and bridging were observed through both 2D tomography slices and 3D CT images. Spatial distributions of voids and cracks were obtained to understand the overall cracking process within the specimen. Furthermore, the XCT images of the original configuration of the specimen were processed and used to build microscale realistic 3D finite element (FE) models. Cohesive interface elements were inserted into the FE mesh to capture complicated discrete crack initiation and propagation. An FE simulation of uniaxial compression was conducted and validated by the in situ XCT compression test results, followed by a tension simulation using the same image-based model to investigate the cracking behaviour. The quantitative agreement between the FE simulation and experiment demonstrates that it is a very promising and effective technique to investigate the internal damage and fracture behaviour in multiphasic composites by combining the in situ micro XCT experiment and image-based FE modelling.

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Section: Mesoscale Structure Characterisationmentioning

confidence: 99%

Section: Mesoscale Structure Characterisationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Three‐Dimensional In Situ XCT Characterisation and FE Modelling of Cracking in Concrete

et al. 2018

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“…Porous concrete can be an alternative in road pavement to reduce the problems caused by runoff or surface water. As porous concrete has a large percentage of pores, its mechanical characteristics are different from normal concrete [1]. The porosity of porous concrete strongly demonstrates the strength of concrete [2].…”

Section: Introductionmentioning

confidence: 99%

Effect of fly ash on the strength of porous concrete using recycled coarse aggregate to replace low-quality natural coarse aggregate

Arifi

Cahya

Remayanti

2017

AIP Conference Proceedings

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Early age compressive strength, porosity, and sorptivity of concrete using peat water to produce and cure concrete AIP Conference Proceedings 1887, 020027 (2017) Abstract. The performance of porous concrete made of recycled coarse aggregate was investigated. Fly ash was used as cement partial replacement. In this study, the strength of recycled aggregate was coMPared to low quality natural coarse aggregate which has high water absorption. Compression strength and tensile splitting strength test were conducted to evaluate the performance of porous concrete using fly ash as cement replacement. Results have shown that the utilization of recycled coarse aggregate up to 75% to replace low quality natural coarse aggregate with high water absorption increases compressive strength and splitting tensile strength of porous concrete. Using fly ash up to 25% as cement replacement improves compressive strength and splitting tensile strength of porous concrete.

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“…Therefore, poor freezing-thawing resistance is a big obstacle that must be overcome for wide use of pervious concrete pavement in north China. Several studies have been carried out on mechanical properties of pervious concrete (Sonebi and Bassuoni 2013;Agar-Ozbek et al, 2013). Strength and freezingthawing durability of pervious concrete can be achieved by using small amount of sand and microfibers in the production.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Effects of Admixtures on Freezing-Thawing Resistance of Pervious Concrete

Zhang¹,

Ming²,

Ma³

et al. 2017

dtmse

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Pervious concrete pavements have good drainage and noise reduction capabilities; however, the low freezing-thawing resistance is an intrinsic weakness of pervious concrete. The study mainly focuses on the effects of admixtures on the compressive strength and freezing-thawing resistance of pervious concrete. Five admixtures, including fly ash, silica fume, mineral powder, ethylene vinyl acetate (EVA) latex, and polyethylene fiber were used in the tests, and the effect of 0%, 2%, 5%, 6%, 8%, and 10% weight percentages as a cement replacement in concrete mixtures on the freezing-thawing resistance was studied. The results indicated increase trends in freezing-thawing resistance of the pervious concrete specimens with the admixtures added.

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Investigating porous concrete with improved strength: Testing at different scales

Cited by 101 publications

References 23 publications

Three‐Dimensional In Situ XCT Characterisation and FE Modelling of Cracking in Concrete

Three‐Dimensional In Situ XCT Characterisation and FE Modelling of Cracking in Concrete

Effect of fly ash on the strength of porous concrete using recycled coarse aggregate to replace low-quality natural coarse aggregate

Experimental Study on the Effects of Admixtures on Freezing-Thawing Resistance of Pervious Concrete

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