Effect of silica fume/binder ratio on compressive strength development of reactive powder concrete under two curing systems

Abed, Mohammed Kareem; Nasr, Mohammed Salah; Hasan, Zaid Ali

doi:10.1051/matecconf/201816202022

Cited by 18 publications

(8 citation statements)

References 5 publications

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“…Energies 2019, 12,x FOR PEER 11 of 15 oblique crack angle of about 45 degrees. The coarse aggregate on the shear flour was sheared, and the crushed cement mortar powder was found on the failure surface.…”

Section: Compressive Strength Criteriamentioning

confidence: 99%

“…Golewski considers that using fly ashes cement binder causes a lot of benefits-both from the point of view of ecology and sustainable construction [3]. With the in-depth research of reactive powder concrete (RPC), the RPC has been well-developed and has been promoted in different applications, such as municipal works, roads and bridges [3][4][5][6][7][8][9][10][11][12][13][14][15][16]. However, limited research on adding reactive powder to self-compacting concrete has been done.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical and Ultrasonic Testing of Self-Compacting Concrete

Sun

Tian

et al. 2019

Energies

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Based on the urban shantytown renovation project in Hongguang Town, Helan County, Ningxia, in Northwest China, the influence of fly ash and silica fume admixture on the mechanical properties of Self-compacting Concrete (SCC) was tested and analyzed in this work. The experimental tests including compressive strength, splitting strength, triaxial strength and an ultrasonic nondestructive test. Furthermore, the Back Propagation (BP) neural network algorithms were established. The results show that there is an obvious difference between the development law of compressive strength of SCC and that of ordinary concrete. The splitting pressure ratio of SCC is 1/10 to 1/8, while that of ordinary concrete is 1/13 to 1/10. Moreover, the peak strain, peak stress and initial stiffness of SCC increase with the increase of the confining pressure when compressed from three directions. In addition, the ultrasonic amplitude of SCC can reflect the changing laws of its compressive strength. As a conclusion, the addition of fly ash and silica fume increases the splitting pressure ratio of SCC. More importantly, the compressive strength formula for SCC with silica fume and a low content of fly ash is proposed, and the model equation between the amplitude and compressive strength is given. This study provides a reference for the mixture ratio of fly ash and silica fume in the application of SCC.Compared with ordinary concrete, SCC has better properties in terms of realizing labor-saving concrete pouring to improve the quality and speed of construction, and in terms of upgrading the living environment of surrounding residents with reduced noises. Moreover, it also helps solve the steel tube vibration problem during construction [18][19][20]. Previous research [21][22][23][24][25] studied the effects of different amounts of steel fibers and polypropylene fibers on the mechanical properties of self-compacting reactive powder concrete. In particular, fewer examples of conventional triaxial testing on SCC mixed with fly ash and silica fume were reported. For instance, Farnam [26] studied the mechanical properties of 4 kinds of mortar-impregnated concrete specimens with varied steel fiber contents (0%, 2%, 5%, and 10%) under 4 sorts of confining pressures, and Giorgio proposed a micromorphic, non-linear 3D model [27]. In addition, the implementation of the national capacity-reduction policy and the clean utilization of coal make fly ash a prominent resource at present. Therefore, there is still large space for the research on SCC with fly ash and silica fume. Based on the urban shantytown renovation project in Hongguang Town, Ningxia, we used fly ash as an admixture for SCC in this work. There are many non-destructive methods used for analysing the concrete structure, such as the Digital Image Correlation (DIC) method [28] and the Ultrasound method. The amplitude was measured by ultrasonic wave, and the relationship between amplitude and compressive strength was established in this work. Furthermore, the relationship between the fly ash and ...

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Section: Compressive Strength Criteriamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mechanical and Ultrasonic Testing of Self-Compacting Concrete

Sun

Tian

et al. 2019

Energies

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“…The steel is Q345 steel, and the stress-strain relationship curve is divided into five stages [28] including elastic stage (oa), elastic-plastic stage (ab), plastic stage (bc), strengthening stage (cd) and secondary plastic flow (de), as shown in Figure 15. The model expression is shown in the formula (6).…”

Section: Materials Constitutive Modelmentioning

confidence: 99%

“…However, Golewski [3] pointed out that from the perspective of economic and sustainable developments, the use of fly ash and silica fume as cementing materials instead of cement will bring many benefits. At present, reactive powder concrete has evolved into a comparatively mature phase and has become popular in various areas such as municipal works, buildings, roads and bridges [4][5][6][7][8][9][10]. Nonetheless, there is little research on self-compacting concrete (SCC) of double-doped silica fume-fly ash, and only Yang Zhiwei [11] and Bao Mingxuan [12] have done research on compressive strength, chloride ion penetration resistance and sulfate resistance of SCC of double-doped silica fume-fly ash.…”

Section: Introductionmentioning

confidence: 99%

Study on Mechanical Properties of Self-Compacting Concrete and Its Filled in-Line Multi-Cavity Steel Tube Bundle Shear Wall

Sun

Zhang

et al. 2019

Energies

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In this paper, five groups of C40 fly ash and silica fume self-compacting concrete (SCC) mix proportion tests and in-line multi-cavity steel tube bundle self-compacting concrete shear wall axial compression performance tests and numerical simulation are completed and presented. The influence of fly ash and silica fume additions on SCC mechanical properties and the filled in-line multi-cavity steel tube bundle shear wall mechanical properties are analyzed and studied. With an increase in the fly ash content from 10% to 40%, the compressive strength of self-compacting concrete increases firstly and then decreases. When the fly ash content is 30% and the silica fume content is 4%, the compressive strength of the 28 d age self-compacting concrete is the highest and the compressive strength formula of the wrapped curing SCC is proposed. The failure of steel tube bundle is multi-wave buckling failure. As the SCC is most obviously affected by the collar at the corner point of the steel tube bundle, its compressive strength is 110 MPa, and is 96 MPa higher than the concrete at the middle point of the web. The deformation resistance of SCC is obviously enhanced by the confinement effect.

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“…Furthermore, specific and more expensive ingredients such as silica fume (SF) play an important role in RPC, improving the microstructure of this particular concrete [4,10]. The addition of SF to RPC can enhance its mechanical qualities [4,11] (and durability) by decreasing its permeability to water and chemicals and enhancing its resilience to freeze-thaw cycles [7,12,13].…”

Section: Introductionmentioning

confidence: 99%

Multi-Criteria Optimization of Cost-Effective and Environmentally Friendly Reactive Powder Concrete Incorporating Waste Glass and Micro Calcium Carbonate

Abellán-García,

Daza,

Molinares

et al. 2023

Materials

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In pursuit of developing an eco-friendly and cost-effective reactive powder concrete (RPC), we utilized a multi-objective optimization technique. This approach pivoted on the incorporation of byproducts, with a spotlight on ground glass powder (GP) as a pivotal supplementary cementitious material (SCM). Our goal was twofold: engineering cost-efficient concrete while maintaining environmental integrity. The derived RPC showcased robust mechanical strength and impressive workability. Rigorous evaluations, containing attributes like compressive strength, resistance to chloride ion penetration, ultrasonic pulse speed, and drying shrinkage, highlighted its merits. Notably, the optimized RPC, despite an insignificant decrease in compressive strength at 90 days compared to its traditional counterpart, maintained steady strength augmentation over time. The refinement process culminated in a notable 29% reduction in ordinary Portland cement (OPC) usage and a significant 64% decrease in silica fume (SF), with the optimized mix composition being 590 for cement, 100 for SF, 335 for GP, and 257 kg/m3 for calcium carbonate. Additionally, the optimized RPC stood out due to the enhanced rheological behavior, influenced by the lubricative properties of calcium carbonate and the water conservation features of the glass powder. The reactive properties of SF, combined with GP, brought distinct performance variations, most evident at 28 days. Yet, both mixtures exhibited superior resistance to chloride, deeming them ideal for rigorous settings like coastal regions. Significantly, the RPC iteration, enriched with selective mineral admixtures, displayed a reduced tendency for drying-induced shrinkage, mitigating potential crack emergence.

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Effect of silica fume/binder ratio on compressive strength development of reactive powder concrete under two curing systems

Cited by 18 publications

References 5 publications

Mechanical and Ultrasonic Testing of Self-Compacting Concrete

Mechanical and Ultrasonic Testing of Self-Compacting Concrete

Study on Mechanical Properties of Self-Compacting Concrete and Its Filled in-Line Multi-Cavity Steel Tube Bundle Shear Wall

Multi-Criteria Optimization of Cost-Effective and Environmentally Friendly Reactive Powder Concrete Incorporating Waste Glass and Micro Calcium Carbonate

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