Quality Evaluation of Basalt Aggregates from JEJU Island

Jang, Myunghoun; Choi, Hee-Bok

doi:10.5345/jkibc.2013.13.5.449

Cited by 5 publications

(4 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Lee et al [16] collected carcass grade data of steers raised in Gangwon-do Province farms, and data of CWT, EMA, BFT, and MS were 431.77±51.43 kg, 91.22±10.75 cm 2 , 13.30±5.14 mm, 5.66±1.88 point, respectfully, which matched the numbers of the two earlier studies. The average carcass grade of the top 10% of market price among Hawnoo in 2021 was 449.9±56.1 kg, 106.6±13.10 cm 2 , 12.40±4.1 mm, and 8.40±0.9 point, which is similar to the data of the test population apart from MS [17]. The test population can be part of the top 10% of Hanwoo, and if it is used for livestock improvement selection, it is thought that the production of individuals with higher carcass grades is possible (Table 1).…”

Section: Discussionsupporting

confidence: 76%

Comparison on genomic prediction using pedigree BLUP and single step GBLUP through the Hanwoo full-sib family

Kim¹,

Kang²,

Myung³

et al. 2023

Anim Biosci

View full text Add to dashboard Cite

Objective: When evaluating individuals with the same parent and no phenotype by pedigree best linear unbiased prediction (BLUP), it is difficult to explain carcass grade difference and select individuals because they have the same value in pedigree BLUP (PBLUP). However, single step GBLUP (ssGBLUP), which can estimate the breeding value suitable for the individual by adding genotype, is more accurate than the existing method.Methods: The breeding value and accuracy were estimated with pedigree BLUP and ssGBLUP using pedigree and genotype of 408 Hanwoo cattle from 16 families with the same parent among siblings produced by fertilized egg transplantation. A total of 14,225 Hanwoo cattle with pedigree, genotype and phenotype were used as the reference population. PBLUP obtained estimated breeding value (EBV) using the pedigree of the test and reference populations, and ssGBLUP obtained genomic EBV (GEBV) after constructing and H-matrix by integrating the pedigree and genotype of the test and reference populations.Results: For all traits, the accuracy of GEBV using ssGBLUP is 0.18 to 0.20 higher than the accuracy of EBV obtained with PBLUP. Comparison of EBV and GEBV of individuals without phenotype, since the value of EBV is estimated based on expected values of alleles passed down from common ancestors. It does not take Mendelian sampling into consideration, so the EBV of all individuals within the same family is estimated to be the same value. However, GEBV makes estimating true kinship coefficient based on different genotypes of individuals possible, so GEBV that corresponds to each individual is estimated rather than a uniform GEBV for each individual.Conclusion: Since Hanwoo cows bred through embryo transfer have a high possibility of having the same parent, if ssGBLUP after adding genotype is used, estimating true kinship coefficient corresponding to each individual becomes possible, allowing for more accurate estimation of breeding value.

show abstract

Section: Discussionsupporting

confidence: 76%

Comparison on genomic prediction using pedigree BLUP and single step GBLUP through the Hanwoo full-sib family

Kim¹,

Kang²,

Myung³

et al. 2023

Anim Biosci

View full text Add to dashboard Cite

show abstract

“…Studies have reported that basalt aggregates from Jeju Island are more porous than aggregates from other geographic regions, and that their absorption varies widely from 0–10%, whereas basalt aggregates from other countries have a low absorption (below 2%) [ 16 , 17 , 18 , 19 , 20 , 21 , 22 ]. Indeed, basalt collected from aggregate quarries on Jeju Island have been found to have an average absorption of about 3%, which is higher than that of other rock aggregates obtained in South Korea [ 23 ]. Moreover, the extensive pores present in the basalt increase its specific surface area, adversely impacting the removal of mortar from waste concrete containing basalt aggregate, which is suspected to degrade the quality of the recycled aggregate and the resulting concrete.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Basalt-Based Recycled Aggregate Concrete for Jeju Island

et al. 2021

View full text Add to dashboard Cite

Recycled aggregate is essential to protect Jeju Island’s natural environment, but waste concrete, including porous basalt, is a factor that lowers the quality of recycled aggregate. Therefore, an experiment was conducted to analyze the properties of concrete application of basalt-based recycled aggregate (B-RA) through quality improvement. The absorption of the B-RA ranged from 3–5%; restricting its absorption to less than 3% was challenging owing to its porosity and irregular shape. However, the increase in the solid volume percentage of the concrete when replacing 25 or 50% of fresh basalt aggregate with recycled basalt aggregate improved the mechanical performance of the concrete, especially at 25%, for which a compressive strength of 55.9 MPa and modulus of elasticity of 25.9 GPa exceeded those of concrete with fresh basalt aggregate. Moreover, increasing the replacement ratio of the fresh basalt with recycled aggregate reduced the slump and decreased the air content, consequently increasing the concrete drying shrinkage. However, the replacement of fresh basalt aggregate with recycled basalt aggregate unaltered the mechanical performance of the concrete. The results indicate that efficient use of recycled aggregates can yield superior performance to that of fresh basalt, irrespective of aggregate quality.

show abstract

“…Jang and Choi conducted quality tests such as aggregate stability, aggregate abrasion resistance, and aggregate crushability tests, as well as component analysis and strength evaluation to use Jeju Island basalt as a coarse aggregate for concrete. The compressive and tensile strengths of basalt from Jeju Island were higher than those of rocks from other regions, but basalt aggregates from some regions were found to not satisfy Korean standards [23]. Kim and Lee conducted a study to mix Jeju Island basalt stone sludge with cement and used it as a filler for modified and recycled asphalt mixtures and general asphalt mixtures.…”

Section: Introduction 1background and Purposementioning

confidence: 99%

Evaluation of Properties of Asphalt Concrete Mixture Using Basalt Aggregate from Jeju Island

Han,

Baek

2023

Buildings

View full text Add to dashboard Cite

In this study, the engineering properties of basalt aggregate used for asphalt road pavement on Jeju Island were evaluated, and the characteristics of the asphalt mixtures used were evaluated to assess the suitability of Jeju Island basalt as road construction material. Chemical composition and surface morphology analysis of the basalt and granite aggregate, engineering characteristics analysis, and filler property evaluation were performed. Mix design was performed, and the basic properties of three asphalt mixtures for the surface, intermediate, and base layers were evaluated. Permanent deformation resistance was evaluated through a wheel tracking test, and moisture resistance was evaluated through a dynamic immersion test and a tensile strength ratio test. The optimum asphalt contents of the asphalt mixture using low-porosity basalt aggregate and high-porosity basalt aggregate were determined to be 5.7% and 5.9% in the surface layer, 5.3% and 5.4% in the intermediate layer, and 4.7% and 5.1% in the base layer, respectively. It was found that the basic properties of the asphalt mixtures satisfied Korean quality standards. The dynamic immersion test results of low-porosity basalt aggregate and high-porosity basalt aggregate were 20% and 10%, respectively, which fall far below the quality standard of 50%. The tensile strength ratios of the basalt asphalt mixtures for the intermediate layer were 0.69 and 0.40, and they were found to increase significantly to 0.87 and 0.80 after the application of a suitable anti-stripping agent. Therefore, it was concluded that in order to apply Jeju Island basalt to asphalt pavement, an appropriate anti-stripping material must be applied.

show abstract

Quality Evaluation of Basalt Aggregates from JEJU Island

Cited by 5 publications

References 6 publications

Comparison on genomic prediction using pedigree BLUP and single step GBLUP through the Hanwoo full-sib family

Comparison on genomic prediction using pedigree BLUP and single step GBLUP through the Hanwoo full-sib family

Mechanical Properties of Basalt-Based Recycled Aggregate Concrete for Jeju Island

Evaluation of Properties of Asphalt Concrete Mixture Using Basalt Aggregate from Jeju Island

Contact Info

Product

Resources

About