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(사)한국터널지하공간학회

ISSN : 2233-8292

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Vol.16 No.2
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Long-term strength of shotcrete with improved C12A7 based mineral accelerator

(사)한국터널지하공간학회 / (사)한국터널지하공간학회, (P)2233-8292; (E)2287-4747
2014, v.16 no.2, pp.135-148
https://doi.org/10.9711





& (2014). Long-term strength of shotcrete with improved C12A7 based mineral accelerator. (사)한국터널지하공간학회, 16(2), 135-148, https://doi.org/10.9711
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Abstract

This study was performed to evaluate the performance about Improved C12A7 based mineral accelerator (ICM) increased in initial and long-term strength. ICM was developed to overcome the long-term strength decrease in existing accelerator. To evaluate the performance of ICM according to addition rate, setting time, compressive strength, and flexural strength tests were conducted in laboratory. In results, initial setting time was slower, final setting time was faster than existing C12A7 based mineral accelerator (CM) when usage of ICM 6%. In compressive and flexural strength, existing CM was higher than ICM at 3hours and 1day. After 7days, strength of shotcrete using ICM was increased. Rebound test, compressive strength and flexural strength test with optimum addition rate through the laboratory test were conducted in field. Field experiment results were the same as laboratory test. Long-term strength performance of ICM was superior to existing accelerator.

keywords
개랑형 C12A7계 광물계 급결제, 숏크리트, 장기강도, 혼화재, Admixture, C12A7 mineral based accelerator, Long-term Strength, Shotcrete

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