Properties of self‐compacting concrete containing copper slag aggregate after heating up to 400°C

Gong, Wei; Ueda, Tamon

doi:10.1002/suco.201700234

Cited by 17 publications

(16 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The strength of concrete with less than 40% of CS replacement for fine aggregate was higher than or equal to that of the control specimen and also RCC concrete elements have a considerable of amount of strength increased in the compressive, split tensile, flexural characteristics, and energy absorption characteristics . Wei Gong et al investigated the influence of heating up to 400°C on properties of the self compacting concrete containing recycled CS fine aggregate and reported that reduction of compressive strength is not severe when the replacement rate is less than 40% CS . Whereas the load at first crack of the beam is increased by 8.1% for FA20CS80 and ultimate load carrying capacity also higher than the control concrete beams.…”

Section: Resultsmentioning

confidence: 99%

“…24 Wei Gong et al investigated the influence of heating up to 400 C on properties of the self compacting concrete containing recycled CS fine aggregate and reported that reduction of compressive strength is not severe when the replacement rate is less than 40% CS. 25 Whereas the load at first crack of the beam is increased by 8.1% for FA20CS80 and ultimate load carrying capacity also higher than the control concrete beams.…”

Section: Cracking Loads and Ultimate Loads On Beamsmentioning

confidence: 88%

See 1 more Smart Citation

Studies on flexural behavior of reinforced concrete beams with copper slag and fly ash

Raju

Dharmar²

2019

Structural Concrete

View full text Add to dashboard Cite

This paper presents the fresh and hardened concrete properties with fly ash (FA) and copper slag (CS). M30 grade of concrete has been designed with a constant water–cement ratio as 0.4. Twenty four concrete mixtures are arrived by cement is partially replaced by FA from 0 to 30% with 10% increment and natural sand is replaced by CS from 0 to 100% at 20% increment. The compressive strength of the concrete was verified at 3, 7, 14, 28, 56, and 90 days curing periods. Five reinforced concrete (RC) beams of size 150 mm × 250 mm × 3200 mm were cast based on the optimum mix proportion and flexural behavior of RC beams was monitored by a four‐point bending test. From the experimental results, compressive strength, and flexural strength were increased for concrete with 30% FA and 80% of CS because the smaller surface area of CS per unit volume is exposed with a large quantity of concrete matrix and workability of concrete also increased.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Cracking Loads and Ultimate Loads On Beamsmentioning

confidence: 88%

Studies on flexural behavior of reinforced concrete beams with copper slag and fly ash

Raju

Dharmar²

2019

Structural Concrete

View full text Add to dashboard Cite

show abstract

“…Behavior of NWSCC is represented in Figure 31 [ 75 , 101 , 102 , 103 , 104 , 105 ]; the wide variety of the results is a consequence of the difference in the constituents used in the making of the SCC samples. NWSCC seems to show an increase in residual compressive strength mostly between 200 °C and 400 °C.…”

Section: Response Of Different Concrete Types Exposed To Elevated Tem...mentioning

confidence: 99%

Performance of Different Concrete Types Exposed to Elevated Temperatures: A Review

et al. 2022

View full text Add to dashboard Cite

Concrete is a heterogeneous material that consists of cement, aggregates, and water as basic constituents. Several cementitious materials and additives are added with different volumetric ratios to improve the strength and durability requirements of concrete. Consequently, performance of concrete when exposed to elevated temperature is greatly affected by the concrete type. Moreover, post-fire properties of concrete are influenced by the constituents of each concrete type. Heating rate, days of curing, type of curing, cooling method, and constituents of the mix are some of the factors that impact the post-fire behavior of concrete structures. In this paper, an extensive review was conducted and focused on the effect of concrete constituents on the overall behavior of concrete when exposed to elevated temperature. It was evident that utilizing fibers can improve the tensile capacity of concrete after exposure to higher temperatures. However, there is an increased risk of spalling due to the induced internal stresses. In addition, supplementary cementitious materials such as metakaolin and silica fume enhanced concrete strength, the latter proving to be the most effective. In terms of the heating process, it was clear that several constituents, such as silica fume or fly ash, that decrease absorption affect overall workability, increase the compressive strength of concrete, and can yield an increase in the strength of concrete at 200 °C. Most of the concrete types show a moderate and steady decrease in the strength up until 400 °C. However, the decrease is more rapid until the concrete reaches 800 °C or 1000 °C at which it spalls or cannot take any applied load. This review highlighted the need for more research and codes’ provisions to account for different types of concrete constituents and advanced construction materials technology.

show abstract

“…For the damage identification of reinforced concrete (RC) structures at room temperature, researchers have conducted various theoretical analysis and experimental studies 3,4 . However, the identification of structural damages and material properties under high temperatures is relatively limited 5–7 . Seyed and Mohammad 5 used the natural frequency as input data to a support vector machine (SVM) and beam‐column connection damage characteristics as the SVM output data to detect frame node damages.…”

Section: Introductionmentioning

confidence: 99%

Modal‐based identification method of fire damage in reinforced concrete T‐beams using support vector machine and firefly algorithm

Liu

Song

Liu

et al. 2021

Struct Control Health Monit

View full text Add to dashboard Cite

Summary To determine the degree of fire damage in reinforced concrete (RC) T‐beams, a damage identification method based on an improved support vector machine and firefly algorithm (FA‐SVM) is proposed herein. First, based on the fire test of 10 simply supported beams, a refined finite element model of simply supported T‐beams was established. A modal analysis of the simply supported beams was performed to obtain a sample library of the input and output parameters for the FA‐SVM identification network. Subsequently, the trained FA‐SVM identification network was used to predict the fire exposure duration of the samples. The sectional temperature during the fire exposure duration could be calculated by using the finite element model, and the bending stiffness and bending capacity of the simply supported beams after exposure to the fire were calculated. The test sample results were similar to the experimental results of the simply supported beams exposed to fire for 60, 90, and 120 min, which demonstrated the feasibility and effectiveness of the proposed method. Finally, a three‐step method for fire damage identification suitable for RC continuous beams was developed based on the FA‐SVM identification network. An example calculation analysis of three‐span continuous beams was performed, and the results demonstrated accuracy of the identification results. The identification sample magnitude was significantly reduced using this method, which can be conveniently used in practical engineering applications.

show abstract

Properties of self‐compacting concrete containing copper slag aggregate after heating up to 400°C

Cited by 17 publications

References 23 publications

Studies on flexural behavior of reinforced concrete beams with copper slag and fly ash

Studies on flexural behavior of reinforced concrete beams with copper slag and fly ash

Performance of Different Concrete Types Exposed to Elevated Temperatures: A Review

Modal‐based identification method of fire damage in reinforced concrete T‐beams using support vector machine and firefly algorithm

Contact Info

Product

Resources

About