Experimental Study on Punching Performance of Recycled Aggregate Concrete Thin Wallboard with Single-Layer Reinforcement

Li, Wenchao; Cao, Wanlin; Zong, Nana; Wang, Ruwei; Ren, Lele

doi:10.3390/app8020188

Cited by 4 publications

(4 citation statements)

References 21 publications

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“…Sun et al 46 used a stress–strain relationship (Equation ()) for RAC in tension similar to the conventional concrete as recommended in the Chinese standard GB50010‐2010 42

\overset{true¯}{σ_{t}^{r}} = \{\begin{matrix} a \overset{true¯}{ϵ_{t}} - (a - 1) {\overset{ϵ_{t}}{true}}^{6}, (\overset{true¯}{ϵ_{t}} \leq 1) \\ α_{t} {((), \overset{ϵ_{t}}{true} goodbreak- 1)}^{1.7} + \overset{true¯}{ϵ_{t}}, (\overset{true¯}{ϵ_{t}} > 1) \end{matrix}

where

\overset{true¯}{σ_{t}^{r}} = σ / σ_{t}^{r}

\overset{true¯}{ϵ_{t}} = ϵ / ϵ_{t}^{r}

σ_{t}^{r}

= cracking strength of RAC =

(- 0.06 r + 0.24) {((), σ_{italiccu}^{r})}^{\frac{2}{3}},

ϵ_{t}^{r} =

strain corresponds to

σ_{t}^{r}

, and as per the Chinese standard GB50010‐2010, 42 it is estimated to be

1 \times 10^{- 4}

for the calculated

σ_{t}^{r}

value. The values of constants

a

and

α_{t}

can be obtained from Sun et al 46 and GB50010‐2010,…”

Section: Numerical Simulation Studymentioning

confidence: 99%

Experimental and numerical study of recycled aggregate concrete column

Pradhan

Nayak

Kumar

et al. 2023

Structural Concrete

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The improved mechanical properties of recycled aggregate concrete (RAC) by employing the particle packing method (PPM) of the mix design approach encourages its application to study the performance of structural members. The experimental investigation is conducted on the axial compressive behavior of reinforced natural aggregate concrete (NAC) and RAC columns using two different tie spacing conditions. A reduction of 18% in the axial load of RAC columns is observed with respect to the NAC columns and only 2.7% improvement in axial load is recorded as the tie spacing reduces by 22.5%. Subsequently, the finite element (FE) analysis is conducted to investigate the axial compressive strength of both NAC and RAC columns using different tie spacing conditions. The FE analyses of RAC columns with different tie spacing support to modify the spacing of transverse reinforcement as half as that of the spacing specified in the prevailing design for NAC columns.

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“…Sun et al 46 used a stress–strain relationship (Equation ()) for RAC in tension similar to the conventional concrete as recommended in the Chinese standard GB50010‐2010 42

\overset{true¯}{σ_{t}^{r}} = \{\begin{matrix} a \overset{true¯}{ϵ_{t}} - (a - 1) {\overset{ϵ_{t}}{true}}^{6}, (\overset{true¯}{ϵ_{t}} \leq 1) \\ α_{t} {((), \overset{ϵ_{t}}{true} goodbreak- 1)}^{1.7} + \overset{true¯}{ϵ_{t}}, (\overset{true¯}{ϵ_{t}} > 1) \end{matrix}

where

\overset{true¯}{σ_{t}^{r}} = σ / σ_{t}^{r}

\overset{true¯}{ϵ_{t}} = ϵ / ϵ_{t}^{r}

σ_{t}^{r}

= cracking strength of RAC =

(- 0.06 r + 0.24) {((), σ_{italiccu}^{r})}^{\frac{2}{3}},

ϵ_{t}^{r} =

strain corresponds to

σ_{t}^{r}

, and as per the Chinese standard GB50010‐2010, 42 it is estimated to be

1 \times 10^{- 4}

for the calculated

σ_{t}^{r}

value. The values of constants

a

and

α_{t}

can be obtained from Sun et al 46 and GB50010‐2010,…”

Section: Numerical Simulation Studymentioning

confidence: 99%

Experimental and numerical study of recycled aggregate concrete column

Pradhan

Nayak

Kumar

et al. 2023

Structural Concrete

View full text Add to dashboard Cite

show abstract

“…But when the replacement ratio was 40%, the strength ratio was 14.7% higher than that for the control specimens. This implies that although both the cubic and cylindrical compressive strengths of the compound concrete decreased with increasing replacement ratio, the cubic strength declined more slowly than the cylindrical strength, probably due to the end Based on the experimental results published in recent years, a linear formula Equation (3) has been suggested for predicting the cubic compressive strength of compound concrete made of normal-strength DCLs and FC [27,30]. Taking the observed shape effect into account, Equation (3) can be extended to Equations (4) and (5), which may approximately predict the combined compressive strength of prisms and cylinders:…”

Section: Combined Compressive Strengthmentioning

confidence: 99%

“…More and more raw materials and energy have been consumed in this economic activity. In turn, wastes produced by the industry account for a majority of the overall amount of waste generated [1][2][3][4]. It is estimated that the annual production of waste concrete in China has reached 239 million tons and that it accounts for about one-third of the total construction and demolition waste [5].…”

Section: Introductionmentioning

confidence: 99%

Compressive Behaviors of Prisms Made of Demolished Concrete Lumps and Fresh Concrete

Yong

Chen

2018

Applied Sciences

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Directly adopting coarsely crushed demolished concrete lumps (DCLs) with pouring concrete (referred to as fresh concrete, FC) in new structural members has been demonstrated to be more efficient and environmental than the traditional approach of recycling waste concrete as coarse aggregate particles. In this study, 45 prisms made of FC and DCLs were tested under axial compressive loading up to failure. The varied parameters included the dimensions of the prisms, the replacement ratio of DCLs, and the characteristic size of the lumps. The compressive performance of 36 cubes and cylinders was also experimentally examined for comparison. A formula was developed to predict the strength of compound concrete prisms filled with DCLs. Empirical formulas were also established relating a prism's strength with its elastic modulus and peak strain. It was found that: (a) when the replacement ratio is between 20% and 40%, the strength of a prism is about 1.13 that of a cylinder, due to the casting direction of the prism being different from that of the cylinder; (b) as the size of filler lumps increases relative to the size of the specimen, the strength of prisms decreases faster than that of cylinders, which weaken faster than cubes; and (c) due to the coupling effect of the aggregate size of FC and the specimen size, the compressive strength of prisms first increases with their size and then declines gradually.

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“…Ongoing research is mainly related to recycled aggregate concrete (RAC), which is produced by substituting all or part of natural aggregates with recycled aggregates (i.e., crushed and sieved waste concrete debris). A series of studies on the mechanical properties [2,3], thermal performance [4], and durability [5] of RAC and on the performance of structural members with RAC (including slabs [6], beams [7,8], columns [9], wallboard [10], and frames [11]) have been carried out worldwide. Positive findings from these studies support and encourage the application of RAC in real buildings and structures.…”

Section: Introductionmentioning

confidence: 99%

Fire Behavior of U-shaped Steel Beams Filled with Demolished Concrete Lumps and Fresh Concrete

2018

Applied Sciences

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Abstract:To reuse waste concrete in a more straightforward and simplified way, a new kind of structural member containing fresh concrete (FC) and demolished concrete lumps (DCLs) distinctly larger than conventional recycled aggregates has been proposed. Previous research has shown that, at room temperature, the mechanical performance of the U-shaped steel beams filled with DCLs and FC is similar to that of the U-shaped steel beams filled with FC alone. This research explores the fire behavior of the U-shaped steel beams filled with DCLs and FC. Five specimens including three beams filled with DCLs and FC and two reference beams filled with FC alone were tested in fire. The experimental parameters included the replacement ratio of DCLs, the longitudinal reinforcement ratio, the load ratio, and the thickness of fire insulation. Based on the test results, numerical models in which the thermal resistance at the interface between the U-shaped steel and the in-filled concrete is considered are developed using SAFIR to determine the thermal and structural responses of the specimens. Lastly, parametric studies are carried out preliminarily to investigate the effects of some parameters on the fire resistance of such beams. It is found that the replacement ratio of DCLs within a range of 0% to 33% has a very limited effect on the temperature distribution, structural response, and fire resistance of the specimens, that embedding longitudinal reinforcements can significantly increase the fire resistance of such beams, that the interface thermal resistance can generate a temperature drop of up to 280 • C at the interface between the U-shaped steel and the in-filled concrete, and that the numerical models are capable of predicting the thermal and structural responses of such beams.

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Experimental Study on Punching Performance of Recycled Aggregate Concrete Thin Wallboard with Single-Layer Reinforcement

Cited by 4 publications

References 21 publications

Experimental and numerical study of recycled aggregate concrete column

Experimental and numerical study of recycled aggregate concrete column

Compressive Behaviors of Prisms Made of Demolished Concrete Lumps and Fresh Concrete

Fire Behavior of U-shaped Steel Beams Filled with Demolished Concrete Lumps and Fresh Concrete

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