Hom ntawm MAAs: yuav ua li cas lawv next

Thaum xav txog xws li ib tug tshaj plaws raws li ib tug xis mas hom, koj yuav tsum ua kom pom tseeb rau hauv lub formal kev cai, cov uas yog cov GOST30515-97 uas faib tag nrho cov tshwj xeeb cements thiab civil. Cementitious mixtures yuav muaj ntau bases (ferrite, calcium aluminate los yog Portland MAAs clinker) thiab muaj ntau yam mineral tshuaj.

Tsis tas li ntawd muaj nqis ntsoov teev yog tias ntau hom muaj ntau yam kev MAAs compressive zog, txawv curing tus nqi (thiab feem ntau-bystrotverdeyushchie), txawv qhov chaw lub sij hawm - yog ib tug sib tov uas pib tawv nyob rau hauv tsawg tshaj li 45 feeb thiab muaj medlennoskhvatyvayuschiesya (tshaj 2 teev).

Txhua hom ntawm cement yuav tsum tau raws li ib tug xov tooj ntawm tsis, xws li: cov kev cov ntaub ntawv uas muaj pes tsawg leeg, thooj lub sij hawm, compressive zog, samonapryazheniyu, MAAs ceev xeem, ib tug linear expansion, cov ntsiab lus ntawm qhov yuav tsum tau tshuaj (tshuaj ion, cov leej faj oxide, ib tug oxide ntawm Mg), cov theem ntawm cov dej sib cais , Thaum tshav kub kub thiab lwm yam ntxwv.

Kawm kom paub txog cov muaj pes tsawg leeg ntawm lub MAAs sib tov yuav ua tau los ntawm nws lub npe. Xav paub seev suab MAAs yam ntxwv muab nyob rau hauv lub saum toj no cov qhua raws li nyob rau hauv GOST10178-85. Yog hais tias lub npe pib ntawm lub PC - qhov no yog lub hom ntawm cement raws li nyob rau hauv Portland MAAs clinker, thiab yog hais tias SPC - ces peb slag uas muaj cov ntsiab lus ntawm slag ceeb thawj (tshaj 20%).

Tom qab tag nrho los yog abbreviated npe yog tooj nyob rau hauv cov pua pua, uas txhais tau hais tias compressive zog. Rau Portland yam ntxwv tseem ceeb 600, 550, 500, 400, rau cov slag - cov zauv ntawm 500 mus 300. Tsis tas li ntawd, lub siab tshaj plaws pes tsawg tus ntawm additives A0 (tsis muaj additives) rau d20 teev nyob rau hauv lub npe (additives - 20%). Tej zaum yuav muaj ib tug hais txog ntawm ceev ceev solidification (D), MAAs hydrophobization thiab plastification ntawm sib tov (PL, GF), zus tau tej cov MAAs clinker nrog lub normalized muaj pes tsawg leeg (H) thiab ib qhov txuas mus rau lub sib nug xov Standard.

Piv txwv li, lub hom MAAs PTS550-D5-B-PL yog ib tug Portland MAAs nrog lub compressive zog ntawm 550, uas muaj 5% additives bystrozatverdevayuschim thiab plasticized.

Nrog kev tsim kho ntawm lub tsev nws tseem ceeb heev uas lub voj voj voog hauj lwm twb nqa tawm zoo. Kev mloog yuav tsum tau muab rau lub hauv paus, uas yog feem ntau ua los ntawm pob zeb. Qhob - ib tug sib tov ntawm MAAs, xuab zeb thiab gravel. Hom Maas rau lub hauv paus yuav tsum tau txaus siab compression zog (400-500), thiab ntau dua qhov lub xov tooj, cov tsawg yuav ua tau tus nqi ntawm cov lwm yam ntaub ntawv. Piv txwv li, lub hom ntawm cement seem ntaub ntawv 400 yog npaum li cas nyob rau hauv tus piv 1 \ 3 \ 3, thiab xis mas qib 500 - 1 \ 4 \ 4, ntsig txog.

Maas yog ib tug khoom uas absorbs dej zoo heev, uas yeej muaj feem xyuam rau nws cov khoom - nws thiaj li poob lub zog hais. Yog li ntawd, xaiv cov hom ntawm cement rau lub siv ua hauj lwm, koj yuav tsum tau saib thaum lub sijhawm uas siv thiab ua thiab qhia kom meej rau cia tej yam kev mob, raws li hom MAAs 400 tauj ib lub hlis cia loses 10% ntawm nws lub zog, thiab rau rau lub hlis mus rau poob 30% ntawm cov nta thiab ua MAAs qib 280. no MAAs yuav xav tau ntau pab, Txawm li cas los, yuav lav tsis tau tias lub hauv paus nyob rau hauv cov ntaub ntawv no, peb tau lub yuav tsum tau lub dag lub zog.