1. Nkhani ndi kuchuluka kwa ntchito
Njirayi imatanthawuza zida ndi masitepe ogwiritsira ntchito kuti mudziwe kuchuluka kwa madzi a matope a simenti.
Njira imeneyi ndi ntchito kutsimikiza matope fluidity wa chiphala phulusa Portland simenti, gulu Portland simenti, wamba Portland simenti wothira phulusa chiphala, slag Portland simenti ndi mitundu ina ya simenti anasankha kugwiritsa ntchito njira imeneyi.
2. Miyezo yolozera
Njira yoyesera mphamvu ya simenti ya GB177
GB178 Mchenga wamba woyesera mphamvu ya simenti
JBW 01-1-1 Standard chitsanzo cha fluidity ya matope simenti
3. Njira yodziwira kuchuluka kwa madzi ochepetsera matope ndi motere:
3.1 Zida ndi zida
A. Chosakaniza chamatope;
B. Lumpha tebulo (5mm wandiweyani galasi mbale ayenera kuwonjezeredwa);
C. Cylindrical ramming bar: zopangidwa ndi zitsulo, m'mimba mwake 20mm, kutalika pafupifupi 185mm;
D. truncated chulucho zozungulira nkhungu ndi nkhungu chivundikirocho: truncated chulucho zozungulira nkhungu kukula, kutalika ndi 60±0.5mm, chapamwamba m'mimba mwake φ 70±0.5mm, m'mimba mwake m'munsi 100±0.5mm, nkhungu chivundikirocho ayenera zikugwirizana ndi truncated chulucho zozungulira nkhungu, truncated chitsulo nkhungu chivundikirocho;
E. Wolamulira (kuyezera mtunda wa 300mm) kapena ma calipers okhala ndi mitundu yoyezera 300mm;
F. spatula.
G. Kuchuluka kwa mankhwala (kulemera 1000g, kumva 1g).
3.2. Njira yoyesera
3.2.1 Yezerani momwe madzi amagwiritsidwira ntchito mumatope
A. Yezerani simenti 300g ndi 750g mchenga wokhazikika ndikuuthira mumphika, yambani chosakanizira, onjezerani madzi pang'onopang'ono mukasakaniza kwa masekondi asanu, ndikuwonjezera pasanathe 30s. Siyani kuyambitsa kwa 3min mutatha kuyambitsa makina. Chotsani matope pamasamba ndikuchotsa poto yoyambitsa.
B. Mu kusakaniza matope nthawi yomweyo, ndi chonyowa nsalu pukuta kulumpha tebulo tebulo, ramming ndodo, kudula chulucho kuzungulira nkhungu ndi nkhungu chivundikiro chamkati khoma, ndi kuziika pakati pa galasi mbale, yokutidwa ndi chonyowa nsalu.
C. The matope osakaniza mwamsanga anawagawa zigawo ziwiri mu nkhungu, wosanjikiza woyamba anaika kwa chulucho nkhungu pafupifupi magawo awiri pa atatu mkulu, ndi ramming bala kuchokera m'mphepete mpaka pakati wogawana anaikapo ramming kakhumi ndi zisanu, ndiye yodzaza ndi wosanjikiza wachiwiri wa matope, anaika kwa pafupifupi centimita awiri apamwamba kuposa nkhungu kuzungulira, yemweyo cylindrical ndodo fiffif. Mukakweza mchenga ndi ramming, kanikizani truncate cone ndi dzanja kuti musasunthe.
D. Pambuyo tamping, chotsani chivundikiro cha nkhungu, gwiritsani ntchito spatula kuti muchotse matope omwe ali apamwamba kuposa nkhungu yozungulira ya truncated cone ndikupukuta mosabisa, ndiyeno mokoma kwezani nkhungu yozungulira molunjika mmwamba. Gwiranani chanza ndi kugwedezeka kwa gudumu kuti tebulo lodumpha lidumphe kasanu pamlingo wa sekondi imodzi.
E. Pambuyo kumenya, ntchito calipers kuyeza diffusion awiri a matope pansi, ndi kutenga pafupifupi mtengo wa diameters awiri perpendicular wina ndi mzake monga kufalikira kwa matope pamene madzi ntchito, anasonyeza mm. Pamene matope akuwonetsa diffusivity ndi 140 ± 5mm, kumwa madzi ndikumwa madzi ophatikizira matope.
3.2.2 Malingana ndi njira ya 3.2.1, kumwa madzi kwa matope ndi wothandizira kuchepetsa madzi kunafika 140 ± 5mm.
3.3. Mlingo wochepetsera madzi wa matope oyeretsedwa amawerengedwa motere:
Madzi ochepetsera matope (%) = (W0-W1) / W0 × 100
Kumene, w0 - kumwa madzi (g) pamene kufalikira kwa matope ndi 140±5mm;
W1 - Kugwiritsa ntchito madzi (g) pamene kufalikira kwa matope ndi mankhwala ochepetsera madzi ndi 140±5mm.
Mtengo wa kuchepetsa madzi ndi chiwerengero cha masamu a masamu atatu.
Nthawi yotumiza: Apr-25-2024