MPa pob zeb rau footpath yog dab tsi?
MPa pob zeb rau footpath yog dab tsi?

Video: MPa pob zeb rau footpath yog dab tsi?

Video: MPa pob zeb rau footpath yog dab tsi?
Video: qhia pob zeb tsoj tsuas dub 2024, Kaum ib hlis
Anonim

Cov khoom siv xws li 20 mus rau 50 MPa compressive lub zog ntawm 28 hnub nrog kev tsim kev poob qis uas muaj qhov pom zoo los ntawm 20 mus rau 120 hli muaj nyob rau hauv ob qho tib si 10 hli, 14 hli thiab 20 hli. tag nrho qhov ntau thiab tsawg. Feem ntau siv rau hauv tsev slabs, driveways, footings thiab footpaths.

Tsis tas li ntawd, MPa yog dab tsi?

Txhais . Ib megapascal ( MPa ) yog ib qho kev ntsuas ntawm lub zog compressive ntawm pob zeb . Nws tso cai rau cov neeg soj ntsuam paub tias lub siab npaum li cas tuaj yeem siv rau pob zeb ua ntej nws tawg los yog ua tsis tau. Qhov siab dua MPa ntawm pob zeb , cov khoom siv zog yuav muaj zog dua, thiab qhov tsawg dua nws yuav ua tsis tiav.

Qhov thib ob, qhov sib tov rau 25 MPa yog dab tsi? Cockburn General Purpose Concrete yog qhov sib xyaw ua ke zoo ntawm Cockburn GP Cement, Xuab zeb thiab 10-12mm aggregate. Qhov no 25 MPa pob zeb sib tov yog qhov sib xyaw ua ke siv rau hauv cov kab hluav taws xob ntxiv, cov pob zeb hauv pem teb, kev tsav tsheb thiab cov ko taw.

Ib yam li ntawd, MPa ntsuas li cas hauv pob zeb?

Compressive zog yog ntsuas los ntawm kev tawg cylindrical pob zeb cov qauv hauv lub tshuab compression-testing. Compressive zog yog xam los ntawm qhov tsis ua hauj lwm load muab faib los ntawm qhov cross-sectional cheeb tsam tiv thaiv lub load thiab qhia nyob rau hauv units ntawm phaus-force ib square inch (psi) los yog megapascals ( MPa ).

Class A yog dab tsi?

Qib ntawm pob zeb yog qhov sib xyaw tiag tiag cement , xuab zeb thiab aggregate siv kom tau ib lub zog compressive thaum lub chav kawm ntawm pob zeb ( chav kawm A, B, C lossis D) qhia txog lub zog hauv PSI's, i.e. CLASS A muaj lub cev muaj zog ntawm 4000 lbs.

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