Properties of Blast-Furnace Slag Cement Concrete Subjected to Accelerated Curing

Zulu, Bernard A.; Miyazawa, S.; Nito, Nobukazu

doi:10.3390/infrastructures4040069

Cited by 9 publications

(3 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From the results obtained in compressive strength tests, both mix proportions provided higher and satisfactory concrete strength at demolding time as recommended by AC1 51 7.2R-87 [41]. Additionally, additives such as limestone powder and fine gypsum improved strength gain at all ages, which may also help when dispatching the precast concrete units from the precast yard to site within a generally used period of 14 days after demolding [12,[48][49][50].…”

Section: Discussionmentioning

confidence: 99%

Effect of Limestone Powder and Fine Gypsum on the Cracking Tendency of Blast-Furnace Slag Cement Concrete Subjected to Accelerated Curing

Zulu

Miyazawa

Nito³

2020

Infrastructures

Self Cite

View full text Add to dashboard Cite

Thermal stresses are generated in concrete during the accelerated curing process in precastconcrete. These stresses may cause concrete to crack, which would have a negative effect on thegeneral concrete performance. This paper provides the results of the thermal stress analysis ofconcrete containing 25% replacement of ordinary Portland cement (OPC) by ground granulatedblast-furnace slag cement (GGBFS) with 3000 cm2/g fineness. A total of 2.5% of limestone powderand 1.75% of fine gypsum by mass of OPC were incorporated in the other concrete mix proportionto check their effect on the cracking tendency of concrete. The concrete was subjected to heat curing.JCMAC, a 3D finite element analysis software developed in Japan, was used in this study for thethermal stress analysis. The heat curing period of one day, similar to generally used in the precastconcrete industry for civil engineering products consisting of 3 h preheating period, heating to apeak temperature of 65 °C and this temperature was kept for 3 h, and lastly cooling was used in thestudy. A standard precast box culvert model member together with some experimental resultsobtained in the laboratory were used in the analysis. Lower cracking resistance at 1 day wasobserved in both mix proportions that would lead to cracking at demolding time. Curing sheetswere then introduced in the analysis to cover the precast mold during accelerated curing and thisshowed improvement in cracking resistance of concrete containing limestone powder and finegypsum.

show abstract

Section: Discussionmentioning

confidence: 99%

Effect of Limestone Powder and Fine Gypsum on the Cracking Tendency of Blast-Furnace Slag Cement Concrete Subjected to Accelerated Curing

Zulu

Miyazawa

Nito³

2020

Infrastructures

Self Cite

View full text Add to dashboard Cite

show abstract

“…Therefore, several research investigated the properties of green concrete that uses industrial wastes and byproducts. For example, cement kiln dust 7 – 18 , fly ash 19 – 22 , blast furnace slag 23 – 26 , silica fume 27 – 29 , recycled glass 30 , 31 , granite waste 32 , 33 , and Date Palm Ash 34 – 36 .…”

Section: Literature Reviewmentioning

confidence: 99%

Prediction model for the compressive strength of green concrete using cement kiln dust and fly ash

Bakhoum

Amir

Osama

et al. 2023

Sci Rep

View full text Add to dashboard Cite

Integrating artificial intelligence and green concrete in the construction industry is a challenge that can help to move towards sustainable construction. Therefore, this research aims to predict the compressive strength of green concrete that includes a ratio of cement kiln dust (CKD) and fly ash (FA), then recommend the optimum sustainable mixture design. The artificial neural network (ANN) and multiple linear regression techniques are used to build prediction models and statistics using MATLAB and IBM SPSS software. The input parameters are based on 156 data points of concrete components and compressive strengths that are collected from the literature. The developed models have been trained, validated, and tested for each technique. TOPSIS method is used to assign the optimum mixture design according to three sustainable criteria: compressive strength, carbon dioxide (CO2) emission, and cost. The results of ANN models showed a better prediction of the compressive strength with regression (R) equal to 0.928 and 0.986. The optimum mixture includes CKD 10–20% and FA 0–30%. Predicting the compressive strength of green concrete is a non-destructive approach that has sustainable returns including preservation of natural resources, reduction of greenhouse gas emissions, cost, time, and waste to landfill as well as saving energy.

show abstract

“…It is ground to 45 µm or less in diameter as a white powder. Its Blaine surface area is between (400-600 m 2 /kg), specific gravity is between (2.85-2.95), and the bulk density is between (1050-1375) kg/m 3 [47], [52], [53]. It is stated that when GGBFS particles are less than 10 µm, they contribute to an early strength gaining until 28 days, while particles in the range of 10-45 µm participate in hydration after 28 days and contribute to a later age strength.…”

Section: Ground Granulated Blast Furnace Slag (Ggbfs)mentioning

confidence: 99%

Using Cementitious Materials to Enhance Concrete Properties and Improve the Environment: A Review

Jabbar

2023

ejuow

View full text Add to dashboard Cite

Cement production significantly contributes to carbon dioxide emissions, which increase global warming. Therefore, reducing cement consumption can support efforts to reduce that risk. On the other hand, the consumption of industrial wastes in concrete production contributes to improving the environment. Industrial waste can be used as supplementary cementitious materials (SCMs) to enhance concrete properties. This paper reviews the effects of SCMs, such as silica fume, fly ash, metakaolin, and ground granulated blast furnace slag (GGBFS), on the properties of fresh and hardened concrete. The findings show that SCMs enhance packing density and reduce permeability. The impact of SCMs on concrete properties appears after a period of curing depending on the availability of calcium hydroxide and activity index. Calcium hydroxide produced from cement hydration reacts with silicates of SCMs to produce additional calcium-silicate hydrates that enhance concrete strength and minimize the relatively large size of calcium hydroxide, which lowers porosity. Silica fume and metakaolin raise water demands and reduce workability, while GGBFS and fly ash improve workability. Silica fume, metakaolin, and (10) μm particle size of GGBFS increase early-age strength, (10-45) μm particle size of GGBFS enhances strength after 28 days, while fly ash raises the strength after 90 days. For low cement content, 10 % or less silica fume, (10-30) % fly ash, (10-20) % GGBFS or metakaolin are considered the perfect percentage to arrive at best strength. For high cement content, (25-30) % silica fume or 40 % fly ash is considered the optimum ratio to reach the highest strength.

show abstract

Properties of Blast-Furnace Slag Cement Concrete Subjected to Accelerated Curing

Cited by 9 publications

References 4 publications

Effect of Limestone Powder and Fine Gypsum on the Cracking Tendency of Blast-Furnace Slag Cement Concrete Subjected to Accelerated Curing

Effect of Limestone Powder and Fine Gypsum on the Cracking Tendency of Blast-Furnace Slag Cement Concrete Subjected to Accelerated Curing

Prediction model for the compressive strength of green concrete using cement kiln dust and fly ash

Using Cementitious Materials to Enhance Concrete Properties and Improve the Environment: A Review

Contact Info

Product

Resources

About