Brand simenti: momwe iwo kuyenda

Mu kukambirana chinthu monga mtundu simenti, muyenera kuganizira malangizo ofunda, lomwe ndi GOST30515-97 lomwe limapanga malire kupanga zonse wapadera ndi boma. zosakaniza Cementitious mwina zapansi osiyana (ferrite, calcium aluminate kapena Portland simenti chibanthu) ndipo muli zowonjezera osiyanasiyana mchere.

Komanso Dziwani kuti zopangidwa osiyana ndi magulu a simenti compressive mphamvu osiyana mlingo akuchiritsa (ndipo nthawi zambiri-bystrotverdeyushchie), nthawi zosiyanasiyana kolowera - pali osakaniza kuyamba anaumitsa mu mphindi zosakwana 45 ndipo pali medlennoskhvatyvayuschiesya (pa 2 hours).

Aliyense mtundu wa simenti ayenera azikumana magawo, kuphatikizapo: mndandanda zinthu zikuchokera, nthawi thickening, mphamvu compressive, samonapryazheniyu, simenti kachulukidwe mayeso, ndi kuwonjezeka liniya, nkhani ya mankhwala chofunika (ion chlorine, okusayidi sulfure, ndi okusayidi wa mg), mlingo wa kulekanitsidwa madzi , kutentha ndi makhalidwe ena.

Dziwani zikuchokera simenti osakaniza akhoza kukhala ndi dzina lake. Mwatsatanetsatane decoding makhalidwe simenti kuperekedwa mu alendo pamwamba komanso GOST10178-85. Ngati dzina akuyamba pa PC - ichi ndi chizindikiro cha simenti zochokera Portland simenti chibanthu, ndipo ngati SPC - ndiye ife slag ndi okhutira mkulu wa slag kulemera (pa 20%).

Pambuyo maina zonse kapena chidule ndi manambala mu mazana, amene amatanthauza mphamvu compressive. Kuti Portland khalidwe amayamikira 600, 550, 500, 400, kwa slag wa - manambala kuchokera 500 mpaka 300. Komanso, nambala pazipita zina A0 (palibe zina) kuti D20 zafotokozeredwa mutu (zina - 20%). Anyamula limasonyeza solidification mofulumira (D), simenti hydrophobization ndi plastification wa osakaniza (PL, GF), ulimi wa simenti chibanthu ndi zikuchokera dekhetsa (H) ndi ulalo wa Standard lolingana.

Mwachitsanzo, mtundu simenti PTS550-D5-B-PL ndi Portland simenti ndi mphamvu compressive a 550, ndi 5% zina bystrozatverdevayuschim ndi plasticized.

Ndi kumanga nyumbayi ndikofunika kuti ziro mkombero ntchito kunachitika mosabvuta. chidwi ayenera kuperekedwa ku maziko, amene nthawi zambiri konkire. Konkire - chisakanizo cha simenti, mchenga ndi miyala. Brand simenti maziko ayenera kukhala a psinjika mphamvu mokwanira mkulu (400-500), ndi apamwamba nambala wam'ng'ono akhoza kukhala kuchuluka kwa zipangizo zina. Mwachitsanzo, mtundu wa simenti otsala zipangizo 400 atengedwa mu chiŵerengero 1 \ 3 \ 3, ndi simenti kalasi 500 - 1 \ 4 \ 4, motero.

Simenti ndi zinthu zimene zimatenga madzi bwino, zomwe ndithudi amakhudza katundu - m'kupita watha mphamvu ananena. Choncho, kusankha mtundu wa simenti kwa ntchito yomanga, muyenera kuyang'ana pa tsiku kupanga ndi kukhazikitsa zinthu yosungiramo, monga mtundu simenti 400 pa yosungirako mwezi wotaya 10% wa mphamvu yake, ndi miyezi isanu ndi kutaya 30% mbali ndi kukhala simenti kalasi 280. Pakuti simenti izi adzafunika zowonjezera zambiri Komabe, sitingakumane kuti maziko mu nkhani iyi, timapeza mphamvu amawathandiza.