ALC블럭조 시공시 주의 할점

설계시  고려하여야 할 ALC의 물성 1. ALC의 물성   - 절건 비중 : 0.45~0.55      - 기건 비중 : 0.5~0.6   - 구조계산중량 : 0.65 ton/㎥(보강철물,몰탈 포함)     - 압축 강도 : 30~40kg/㎠      - 인장 강도 :  5kg/㎠      - 휨    강도 : 10kg/㎠      - 전단 강도 :  5kg/㎠      - 부착 강도 : 20kg/㎠      - 열전도율  : 0.09~0.12 kcal/mh℃      - 비       열 : 0.25 kcal/kg℃(비중 0.54)       - 전면 흡수율 : 28%/vol(10x10x10cm입방체 2일간 완전 침수)      - 일면 흡수율 : 20%/vol(10x10x10cm입방체 하부 1cm 2일간 침수)      - 흡  수  율 : 10%/vol      - 건조수축율 : 0.04 %      - 음 투과손실 : 35 ~ 40 dB(1,000Hz에서 두께 100mm기준)      - 흡    음   률 : 0.08 ~ 0.12 (1,000Hz에서 두께 100mm기준) 2. 단열성능  - 두께별 단열성능      -----------------------------------------------------------------------------------------                      두께(mm)                100          125          150        175       200        240      -----------------------------------------------------------------------------------------            열관류율(kcal/㎡h℃)        0.875       0.708       0.595     0.513     0.458     0.395      -----------------------------------------------------------------------------------------   - 별도의 단열재 설치 없이 가능한  ALC 외벽 최소두께 산정         (건축물의 설비기준 등에 관한 규칙 제 21조 관련)      -----------------------------------------------------------------------------------------                지역별 열관류율 규정                                       ALC외벽 두께 설계      -----------------------------------------------------------------------------------------         지  역            건축물의 부위            열관류율(kcal/㎡h℃)    ALC의 두께(mm)    열관류율      -----------------------------------------------------------------------------------------         중  부    외기에 직접 면하는 경우          0.40 이하                        250                   0.395         지  방                        외기에 간접 면하는 경우          0.55 이하                        200                   0.458      -----------------------------------------------------------------------------------------         남  부    외기에 직접 면하는 경우          0.50 이하                        200                  0.458              지  방                         외기에 간접 면하는 경우          0.70 이하                        150                  0.595      -----------------------------------------------------------------------------------------        제주도   외기에 직접 면하는 경우          0.65 이하                         150                  0.595                                          외기에 간접 면하는 경우          0.95 이하                        100                  0.875                           ----------------------------------------------------------------------------------------          3. 내화성능   - ALC는 무기질재료로 구성된 완전 불연재이며 화재시 유독가스나 유독물질을 배출하지 않는다.      - 두께  100mm 이상의 ALC 벽체는 건축법상으로 인정된 법정 내화구조이다.        (건축법 시행령 제 3조 제 3항 : '96. 1. 5 시행)     4. 차음성능   - 차음구조 적용 건축물(건축법 시행령 제 53조)         공동주택의 각 세대간 경계벽, 학교의 교실, 의료시설의 병실, 숙박시설의 객실 및 기숙사의 침실간       칸막이벽은 건설교통부령이 정하는 기준에 의하여 소리를 차단하는데 장애가 되는 부분이 없도록       설치하여야 한다.(차음구조로 하여야 한다.)  - 벽체의 차음구조의 지정 기준(건설교통부 고시 제 1995-191호)     -------------------------------------------------------------             중심주파수(Hz)               음향투과손실(dB)     -------------------------------------------------------------                   125                                     30                   500                                     45                  2,000                                   55     -------------------------------------------------------------  - ALC 200mm + 양면 3mm 수지미장 마감은 국립건설시헙소로부터 위의 지정기준 이상의      음향투과손실을 인정받아  차음구조 지정고시를 받은 제품이다.(1996. 4. 10) ALC의 특성 1.공기단축       - 시공속도의 빠름-부재의 단위면적이 크므로 시공속도가 빠르다.                               1㎡당- ALC BLOCK 4매 소요                               1㎡당-시멘트벽돌 75매 소요       - 미장공사의 간소화-블럭의 단위 면적이 크고 줄눈의 두께가 3mm 정도 이므로 마감면이 평활하여                                    미장마감이 간소화 된다.   - 공정의 간소화-ALC 자체의 단열성능으로 인하여 조적공사시 적용되는 공간쌓기 및 단열재의                             설치공사가  불필요 하다. 2.실내 유효면적의 증가   - ALC BLOCK으로 외벽 시공시 조적조 공법과 대비하여 실내 면적이 66mm가 늘어나며,       내벽에 적용할 경우에는 20mm의 실내 면적이 늘어난다. 3.열손실 방지로 인한 난방비 절감   - ALC의 단열성능은 일반콘크리트의 약 10배가 되며, 일반 조적조의 단열재 시공에 비하여       열교현상(Heat bridge)이 없이 시공할 수 있으므로 건축물의 열손실 방지에 효과가 크다. 4.통기성  - ALC는 증기양생과정을 거쳐 구조적으로 안정된 판상구조의 토버모라이트(Tobermorite)결정으로      미세한 기포와 모세관 구조에 의해 실내의 습기를 흡수하고 방출하여 흙벽과 같이 실내습도를      균형있게 조절하여 주는 기능성 자재이다.  - 토버모라이트(Tobermorite)구조란?     석회질과 규산질 원료의 화학반응을 거쳐 형성되는 토버모라이트 구조는 섬유상 조직을 가진     일종의 미결정 집합체로서 이 구조로 인해 ALC 특유의 물성을 가지게 된다. 5.건물의 자중감소  - ALC의 구조계산 중량은 500 ~ 650 kgf/㎥으로 시멘트벽돌의 1/3 이므로 고층건물의 중량화로 인한      건물의 부동침하 및 크랙(crack)발생을 줄일 수 있다.       설계시 고려하여야 할 ALC의 물성 - 절건 비중 : 0.45~0.55      - 기건 비중 : 0.5~0.6   - 구조계산중량 : 0.65 ton/㎥(보강철물,몰탈 포함)     - 압축 강도 : 30~40kg/㎠      - 인장 강도 :  5kg/㎠      - 휨    강도 : 10kg/㎠      - 전단 강도 :  5kg/㎠      - 부착 강도 : 20kg/㎠      - 열전도율  : 0.09~0.12 kcal/mh℃      - 비       열 : 0.25 kcal/kg℃(비중 0.54)       - 전면 흡수율 : 28%/vol(10x10x10cm입방체 2일간 완전 침수)      - 일면 흡수율 : 20%/vol(10x10x10cm입방체 하부 1cm 2일간 침수)      - 흡  수  율 : 10%/vol      - 건조수축율 : 0.04 %      - 음 투과손실 : 35 ~ 40 dB(1,000Hz에서 두께 100mm기준)      - 흡    음   률 : 0.08 ~ 0.12 (1,000Hz에서 두께 100mm기준) 2. 단열성능  - 두께별 단열성능      -----------------------------------------------------------------------------------------                      두께(mm)                100          125          150        175       200        240      -----------------------------------------------------------------------------------------            열관류율(kcal/㎡h℃)        0.875       0.708       0.595     0.513     0.458     0.395      -----------------------------------------------------------------------------------------   - 별도의 단열재 설치 없이 가능한  ALC 외벽 최소두께 산정         (건축물의 설비기준 등에 관한 규칙 제 21조 관련)      -----------------------------------------------------------------------------------------                지역별 열관류율 규정                                       ALC외벽 두께 설계      -----------------------------------------------------------------------------------------         지  역            건축물의 부위            열관류율(kcal/㎡h℃)    ALC의 두께(mm)    열관류율      -----------------------------------------------------------------------------------------         중  부    외기에 직접 면하는 경우          0.40 이하                        250                   0.395         지  방                        외기에 간접 면하는 경우          0.55 이하                        200                   0.458      -----------------------------------------------------------------------------------------         남  부    외기에 직접 면하는 경우          0.50 이하                        200                  0.458              지  방                         외기에 간접 면하는 경우          0.70 이하                        150                  0.595      -----------------------------------------------------------------------------------------        제주도   외기에 직접 면하는 경우          0.65 이하                         150                  0.595                                          외기에 간접 면하는 경우          0.95 이하                        100                  0.875                           ----------------------------------------------------------------------------------------          3. 내화성능   - ALC는 무기질재료로 구성된 완전 불연재이며 화재시 유독가스나 유독물질을 배출하지 않는다.      - 두께  100mm 이상의 ALC 벽체는 건축법상으로 인정된 법정 내화구조이다.        (건축법 시행령 제 3조 제 3항 : '96. 1. 5 시행)     4. 차음성능   - 차음구조 적용 건축물(건축법 시행령 제 53조)         공동주택의 각 세대간 경계벽, 학교의 교실, 의료시설의 병실, 숙박시설의 객실 및 기숙사의 침실간       칸막이벽은 건설교통부령이 정하는 기준에 의하여 소리를 차단하는데 장애가 되는 부분이 없도록       설치하여야 한다.(차음구조로 하여야 한다.)  - 벽체의 차음구조의 지정 기준(건설교통부 고시 제 1995-191호)     -------------------------------------------------------------             중심주파수(Hz)               음향투과손실(dB)     -------------------------------------------------------------                   125                                     30                   500                                     45                  2,000                                   55     -------------------------------------------------------------  - ALC 200mm + 양면 3mm 수지미장 마감은 국립건설시헙소로부터 위의 지정기준 이상의      음향투과손실을 인정받아  차음구조 지정고시를 받은 제품이다.(1996. 4. 10) ALC의 특성 1.공기단축       - 시공속도의 빠름-부재의 단위면적이 크므로 시공속도가 빠르다.                               1㎡당- ALC BLOCK 4매 소요                               1㎡당-시멘트벽돌 75매 소요       - 미장공사의 간소화-블럭의 단위 면적이 크고 줄눈의 두께가 3mm 정도 이므로 마감면이 평활하여                                    미장마감이 간소화 된다.   - 공정의 간소화-ALC 자체의 단열성능으로 인하여 조적공사시 적용되는 공간쌓기 및 단열재의                             설치공사가  불필요 하다. 2.실내 유효면적의 증가   - ALC BLOCK으로 외벽 시공시 조적조 공법과 대비하여 실내 면적이 66mm가 늘어나며,       내벽에 적용할 경우에는 20mm의 실내 면적이 늘어난다. 3.열손실 방지로 인한 난방비 절감   - ALC의 단열성능은 일반콘크리트의 약 10배가 되며, 일반 조적조의 단열재 시공에 비하여       열교현상(Heat bridge)이 없이 시공할 수 있으므로 건축물의 열손실 방지에 효과가 크다. 4.통기성  - ALC는 증기양생과정을 거쳐 구조적으로 안정된 판상구조의 토버모라이트(Tobermorite)결정으로      미세한 기포와 모세관 구조에 의해 실내의 습기를 흡수하고 방출하여 흙벽과 같이 실내습도를      균형있게 조절하여 주는 기능성 자재이다.  - 토버모라이트(Tobermorite)구조란?     석회질과 규산질 원료의 화학반응을 거쳐 형성되는 토버모라이트 구조는 섬유상 조직을 가진     일종의 미결정 집합체로서 이 구조로 인해 ALC 특유의 물성을 가지게 된다. 5.건물의 자중감소  - ALC의 구조계산 중량은 500 ~ 650 kgf/㎥으로 시멘트벽돌의 1/3 이므로 고층건물의 중량화로 인한      건물의 부동침하 및 크랙(crack)발생을 줄일 수 있다.