Cov Pob Zeb Masonry

Cov cement uas siv rau hauv cov xuab zeb cement yuav tsum tsis txhob loj dua 32.5; cov cement uas siv rau hauv cov cement sib xyaw mortar yuav tsum tsis txhob loj dua 42.5. Yog tias cov cement muaj zog ntau dhau, koj tuaj yeem ntxiv qee cov khoom sib xyaw. Rau qee lub hom phiaj tshwj xeeb, xws li kev teeb tsa cov pob qij txha thiab cov pob qij txha ntawm cov khoom, lossis rau kev txhawb nqa thiab kho cov kab nrib pleb, yuav tsum siv cov cement dav dav. Cov khoom siv cementitious siv rau hauv masonry mortar suav nrog cement thiab lime. Kev xaiv ntawm cov cement ntau yam zoo ib yam li cov cement ntawm concrete. Cov cement qib yuav tsum yog 45 npaug ntawm cov cement qib. Yog tias cov cement qib siab dhau, cov cement yuav tsis txaus, ua rau cov dej tsis khaws cia. Lime paste thiab slaked lime tsis yog tsuas yog siv ua cov ntaub ntawv cementing xwb, tab sis qhov tseem ceeb tshaj, ua rau cov mortar khaws cia dej zoo. Cov pob zeb zoo Cov pob zeb zoo feem ntau yog xuab zeb ntuj, thiab cov mortar npaj hu ua ordinary mortar. Cov av nplaum hauv cov xuab zeb yuav tsum tsis txhob tshaj 5%; thaum cov qib zog tsawg dua m2.5, cov av nplaum yuav tsum tsis txhob tshaj 10%. Qhov loj tshaj plaws ntawm cov xuab zeb yuav tsum tsawg dua 1/4 1/5 ntawm qhov tuab ntawm cov mortar, feem ntau tsis pub tshaj 2.5 hli. Raws li cov mortar rau cov grooves thiab plastering, qhov loj tshaj plaws ntawm cov khoom tsis pub tshaj 1.25 hli. Qhov tuab ntawm cov xuab zeb muaj feem cuam tshuam loj rau qhov ntau ntawm cov cement, kev ua haujlwm tau zoo, lub zog thiab kev ntsws.