Question
Download Solution PDFIS 456:2000 के अनुसार, गंभीर एक्सपोजर स्थितियों वाले M30 कंक्रीट के लिए अधिकतम जल-सीमेंट अनुपात क्या है?
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IS 456: 2000, तालिका 5 के अनुसार;
|
पर्यावरण |
RCC का न्यूनतम ग्रेड |
PCC का न्यूनतम ग्रेड |
नाममात्र कवर |
|
1. मध्यम |
M 20 |
- |
20 mm |
|
2. मध्यम |
M 25 |
M 15 |
30 mm |
|
3. गंभीर |
M 30 |
M 20 |
45 mm |
|
4. अति गंभीर |
M 35 |
M 20 |
50 mm |
|
5. अत्यधिक |
M 40 |
M 25 |
75 mm |
IS 456: 200 के अनुसार, एक्सपोजर स्थितियों के आधार पर साधारण सीमेंट कंक्रीट और प्रबलित सीमेंट कंक्रीट के लिए न्यूनतम सीमेंट सामग्री और अधिकतम जल-सीमेंट अनुपात नीचे दिए गए हैं:
| एक्सपोजर स्थिति | न्यूनतम सीमेंट सामग्री (kg/m3) | अधिकतम जल-सीमेंट अनुपात | न्यूनतम सीमेंट सामग्री (kg/m3) | अधिकतम जल-सीमेंट अनुपात |
| PCC | RCC | |||
| मृदु | 220 | 0.6 | 300 | 0.55 |
| मध्यम | 240 | 0.6 | 300 | 0.5 |
| गंभीर | 250 | 0.5 | 320 | 0.45 |
| अति गंभीर | 260 | 0.45 | 340 | 0.45 |
| अत्यधिक | 280 | 0.40 | 360 | 0.4 |
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