http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
주은희(Joo Eun-Hi),손명수(Shon Myeong-Soo),차천수(Cha Cheon-Soo),김성수(Kim Seong-Soo),한천구(Han Chean-Goo) 한국구조물진단유지관리학회 2005 한국구조물진단학회 학술발표회논문집 Vol.- No.-
This experimental study investigates compressive strength and neutralization of concrete incorporating mineral admixture, including CKD. FA and BS. For the properties of compressive strength, at 3 days, compressive strength of concrete incorporating cement kiln dust(CKD) was comparable to that of plain concrete, due to acceleration of early hydration of CaCO₃. On the other hand, at age of 91 days, concrete incorporating FA and BS exhibited higher strength gain than that of concrete incorporating CKD, due to pozzolanic and potential hydraulicity reaction. Increase of W/B ratio caused high neutralization depth. These of mineral admixture resulted in an increase in neutralization depth. This result can be illustrated by the fact that the incorporation of CKD resulted in an decrease in the cement contents, while alkali portion decreases due to pozzolanic reaction of FA and reduction of both Ca(OH)₂and BS. Variation in physical properties of concrete is probably independent of the type of admixture used in this paper. The type of admixture did not affect any physical properties of concrete. However neutralization depth increased with an increase of M.A. contents.
양생온도가 혼화재 사용 콘크리트의 강도발현에 미치는 영향
주은희 ( Joo Eun-hi ),손명수 ( Shon Myeong-soo ),전현규 ( Jeon Hyun-kyu ),한민철 ( Han Min-cheol ),한천구 ( Han Cheon-goo ) 한국구조물진단유지관리공학회 2005 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.9 No.2
This experimental study influence of curing temperature on strength development of concrete using mineral admixtures such as CKD, FA and BS. For the properties of setting at 5℃, setting time of concrete with mineral admixture was delayed about 3~14 hour compared with that of plain concrete. Use of CKD had a desirable effect on reducing setting retard under 5℃ because of CaCO3 of CKD while use of FA and BS retarded setting time greatly. For compressive strength under 5℃, concrete with CKD had the most compressive strength in early age compared with the other mineral admixtures but exhibited slight strength loss in -5℃ at 28days. Especially, concrete with FA and BS was observed in early stage at low curing temperature because of strength loss remarkably in -5℃.
주은희 ( Joo Eun-hi ),손명수 ( Shon Myeong-soo ),조규일 ( Cho Kyou-il ),차천수 ( Cha Cheon-soo ),한민철 ( Han Mm-cheol ),한천구 ( Han Cheon-goo ) 한국구조물진단유지관리공학회 2004 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.8 No.1
In this paper, estimation of strength development of concrete incorporating cement kiln dust(CKD) is discussed using logistic model under various curing temperature and W/B. Compressive strength is gained with an increase in maturity. Before reaching 840°DㆍD of maturity, similar level of strength development is obtained regardless of CKD presence. Use of CKD has a beneficial effect on strength development of concrete at low curing temperature. Logistic model has a good agreement between measured strength and calculated strength. CKD concrete has slightly lower strength than plain concrete at same maturity. Resultant constant for estimating strength development of plain concrete calculated about 0.965 and for CKD concrete about 0.938. From the scope of the paper, effective strength control method and estimation model related to determine form removal time and protection period against frost damage at early age is provided by table 4 and Fig. 2.
혼화재 치환 콘크리트의 압축강도 및 황산염 침해 저항성에 관한 연구
주은희 ( Joo Eun-hi ),손명수 ( Shon Myeong-soo ),차천수 ( Cha Cheon-soo ),김성수 ( Kim Seong-soo ),한천구 ( Han Cheon-goo ) 한국구조물진단유지관리공학회 2004 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.8 No.2
This paper investigated the results of compressive strength and resistance to sulfate attack of concrete incorporating mineral admixtures. W/B, kinds and contents of mineral admixtures were selected as test parameters. According to test results, use of mineral admixtures resulted in a reduction of fluidity and air contents caused by increased fine particles and absorption effect of FA on reduction of AE agent. Thus, increase of SP and AE agent was needed to maintain the same fluidity and air content as plain concrete. At early stage, use of CKD was beneficial to the compressive strength while at 28days, incorporation of FA and BS had favorable effect on the compressive strength. For resistance to sulfate attack, age led to increase the length and mass loss and decrease of W/B resulted in decrease of the length and mass loss. This was attributed to the enhanced expansion resistance caused by sulfate attack in low W/B concrete.
주은희 ( Joo Eun-hi ),손명수 ( Shon Myeong-soo ),차천수 ( Cha Cheon-soo ),김성수 ( Kim Seong-soo ),한천구 ( Han Cheon-goo ) 한국구조물진단유지관리공학회 2005 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.9 No.1
This experimental study investigates compressive strength and neutralization of concrete incorporating mineral admixture, including CKD, FA and BS. For the properties of compressive strength, at 3 days, compressive strength of concrete incorporating cement kiln dust(CKD) was comparable to that of plain concrete, due to acceleration of early hydration of CaCO<sub>3</sub>. On the other hand, at age of 91 days, concrete incorporating FA and BS exhibited higher strength gain than that of concrete incorporating CKD, due to pozzolanic and potential hydraulicity reaction. Increase of W/B ratio caused high neutralization depth. These of mineral admixture resulted in an increase in neutralization depth. This result can be illustrated by the fact that the incorporation of CKD resulted in an decrease in the cement contents, while alkali portion decreases due to pozzolanic reaction of FA and reduction of both Ca(OH)<sub>2</sub> and BS. Variation in physical properties of concrete is probably independent of the type of admixture used in this paper. The type of admixture did not affect any physical properties of concrete. However neutralization depth increased with an increase of M.A. contents.
[제3분과/구조거동/재료] CKD 치환 콘크리트의 강도 증진 해석
주은희(Joo Eun-Hi),손명수(Shon Myeong-Soo),조규일(Cho Kyou-il),차천수(Cha Cheon-Soo),한민철(Han Min-Cheol),한천구(Han Cheon-Goo) 한국구조물진단유지관리학회 2004 한국구조물진단학회 학술발표회논문집 Vol.- No.-
In this paper, estimation of strength development of concrete incorporating cement kiln dust(CKD) is discussed using logistic model under various curing temperature and W/H. Compressive strength is gained with an increase in maturity. Before reaching 840D·D of maturity, similar level of strength development is obtained regardless of CKD presence. Use of CKD has a beneficial effect on strength development of concrete at low curing temperature. Logistic model has a good agreement between measured strength and calculated strength. CKD concrete has slightly lower strength than plain concrete at same maturity. Resultant constant for estimating strength development of plain concrete calculated about 0.965 and for CKD concrete about 0.938. From the scope of the paper, effective strength control method and estimation model related to determine form removal time and protection period against frost damage at early age is provided by table 4 and Fig. 2.
혼화재 치환 콘크리트의 압축강도 및 황산염 침해 저항성에 관한 연구
주은희(Joo Eun-Hi),손명수(Shon Myeong-Soo),차천수(Cha Cheon-Soo),김성수(Kim Seong-Soo),한천구(Han Cheon-Goo) 한국구조물진단유지관리학회 2004 한국구조물진단학회 학술발표회논문집 Vol.- No.-
This paper investigated the results of compressive strength and resistance to sulfate attack of concrete Incorporating mineral admixtures W/B, kinds and contents of mineral admixtures were selected as test parameters. According to test results, use of mineral admixtures resulted in a reduction of fluidity and air contents caused by Increased fine particles and absorption effect of FA on reduction of AE agent Thus, increase of SP and AE agent was needed to maintain the same fluidity and air content as plain concrete At early stage, use of CKD was beneficial to the compressive strength while at 28lays, incorporation of FA and BS had favorable effect on the compressive strength For resistance to sulfate attack, age led to increase the length and mass loss and decrease of W/B resulted in decrease of the length and mass loss This was attributed to the enhanced expansion resistance caused by sulfate attack In low W/B concrete
양생온도가 혼화재 사용 콘크리트의 강도발현에 미치는 영향
주은희(Joo Eun-Hi),손명수(Shon Myeong-Soo),전현규(Jeon Hyun-Kyu),한민철(Han Min-Cheol),한천구(Han Cheon-Goo) 한국구조물진단유지관리학회 2005 한국구조물진단학회 학술발표회논문집 Vol.9 No.2
This experimental study influence of curing temperature on strength development of concrete using mineral admixtures such as CKD, FA and BS. For the properties of setting at 5℃, setting time of concrete with mineral admixture was delayed about 3~14 hour compared with that of plain concrete. Use of CKD had a desirable effect on reducing setting retard under 5℃ because of CaCO3 of CKD while use of FA and BS retarded setting time greatly. For compressive strength under 5℃, concrete with CKD had the most compressive strength in early age compared with the other mineral admixtures but exhibited slight strength loss in -5℃ at 28days. Especially, concrete with FA and BS was observed in early stage at low curing temperature because of strength loss remarkably in -5℃.