Post Date:10,Nyamavhuvhu,2025

Iyo dosage ye admixtures haisi yakakosha kukosha uye inoda kugadziridzwa zvine simba zvichienderana nehunhu hwezvakagadzirwa, rudzi rweprojekiti uye mamiriro ezvakatipoteredza.

(1) Kupesvedzera kwesimende zvivakwa Kuumbwa kwemaminerari, kunaka uye gypsum fomu yesamende inotarisisa zvinodikanwa zvemusanganiswa. Simende ine yakakwira C3A yemukati (> 8%) ine yakasimba adsorption kugona kune inoderedza mvura uye dosi inoda kuwedzerwa ne10-20%. Kune yega yega 50m2/kg kuwedzera kwesemende chaiyo nzvimbo, iyo inoderedza mvura dosage inoda kuwedzerwa ne 0.1-0.2% kuvhara iyo yakakura nzvimbo. Kune simenti ine anhydrite (dihydrate gypsum content <50%), mvura inoderedza adsorption rate inononoka uye muyero unogona kuderedzwa ne5-10%, asi nguva yekusanganiswa inoda kuwedzerwa kuti ive nechokwadi chekupararira kweyunifomu.

(2) Kupesvedzera kwemamineral admixtures Iyo adsorption maitiro emaminerari admixtures senge nhunzi ash uye slag poda inoshandura iyo inoshanda yekusangana kweanosanganisa. Iyo adsorption capacity yeClass I fly ash (water demand ratio ≤ 95%) yezvinoderedza mvura ingori 30-40% yesamende. Kana uchitsiva 20% yesimende, iyo inoderedza mvura dosage inogona kuderedzwa ne5-10%. Kana iyo chaiyo nzvimbo yeslag poda yakakura kupfuura 450m2/kg, iyo admixture dosage inoda kuwedzerwa ne5-8% pakutsiva 40% yesimende. Kana madota enhunzi uye slag poda zvakasanganiswa muyero ye1: 1 (yakazara kutsiva huwandu 50%), iyo inoderedza mvura dosage inogona kuderedzwa ne3-5% kana ichienzaniswa neiyo imwe slag poda system nekuda kwekuenderana kweadsorption maitiro ezviviri. Nekuda kwenzvimbo yakakura chaiyo ye silica fume (> 15000m2/kg), mvura inoderedza dosi inoda kuwedzerwa ne 0.2-0.3% pagumi rega rega resimende inotsiviwa.

(3) Kupesvedzera kweaggregate zvivakwa Madhaka emukati uye particle saizi kugoverwa kweaggregate mabhesi akakosha ekugadzirisa dosage. Kune yega yega 1% yekuwedzera muguruva rematombo (<0.075mm zvimedu) mujecha, mvura inoderedza dosage inofanira kuwedzerwa ne 0.05-0.1%, sezvo porous chimiro cheguruva rematombo chinotora musanganiswa. Kana zviri mukati metsono-yakaita tsono uye flake aggregate inodarika 15%, iyo inoderedza mvura dosage inofanira kuwedzerwa ne10-15% kuve nechokwadi chekuvhara. Kuwedzera huwandu hwehukuru hweiyo coarse aggregate kubva pa20mm kusvika 31.5mm inoderedza void ratio, uye dosi inogona kuderedzwa ne5-8%.
Iyo dosage ye admixtures haisi yakakosha kukosha uye inoda kugadziridzwa zvine simba zvichienderana nehunhu hwezvakagadzirwa, rudzi rweprojekiti uye mamiriro ezvakatipoteredza.

(1) Kupesvedzera kwesimende zvivakwa Iyo mineral kuumbwa, kutsetseka uye gypsum fomu yesamende inotarisisa zvinodikanwa zvemusanganiswa. Simende ine yakakwira C3A yemukati (> 8%) ine yakasimba adsorption kugona kune inoderedza mvura uye dosi inoda kuwedzerwa ne10-20%. Kune yega yega 50m2/kg kuwedzera kwesemende chaiyo nzvimbo, iyo inoderedza mvura dosage inoda kuwedzerwa ne 0.1-0.2% kuvhara iyo yakakura nzvimbo. Kune simenti ine anhydrite (dihydrate gypsum content <50%), mvura inoderedza adsorption rate inononoka uye muyero unogona kuderedzwa ne5-10%, asi nguva yekusanganiswa inoda kuwedzerwa kuti ive nechokwadi chekupararira kweyunifomu.

(2) Pesvedzero yemamineral admixtures Iyo adsorption maitiro emaminerari admixtures akadai senhunzi ash uye slag poda inoshandura iyo inoshanda yekumisikidza yakasanganiswa. Iyo adsorption capacity yeClass I fly ash (water demand ratio ≤ 95%) yezvinoderedza mvura ingori 30-40% yesamende. Kana uchitsiva 20% yesimende, iyo inoderedza mvura dosage inogona kuderedzwa ne5-10%. Kana iyo chaiyo nzvimbo yeslag poda yakakura kupfuura 450m2/kg, iyo admixture dosage inoda kuwedzerwa ne5-8% pakutsiva 40% yesimende. Kana madota enhunzi uye slag poda zvakasanganiswa muyero ye1: 1 (yakazara kutsiva huwandu 50%), iyo inoderedza mvura dosage inogona kuderedzwa ne3-5% kana ichienzaniswa neiyo imwe slag poda system nekuda kwekuenderana kweadsorption maitiro ezviviri. Nekuda kwenzvimbo yakakura chaiyo ye silica fume (> 15000m2/kg), mvura inoderedza dosi inoda kuwedzerwa ne 0.2-0.3% pagumi rega rega resimende inotsiviwa.

(3) Kupesvedzera kweaggregate zvivakwa Madhaka emukati uye particle saizi kugoverwa kweaggregate mabhesi akakosha ekugadzirisa dosage. Kune yega yega 1% yekuwedzera muguruva rematombo (<0.075mm zvimedu) mujecha, mvura inoderedza dosage inofanira kuwedzerwa ne 0.05-0.1%, sezvo porous chimiro cheguruva rematombo chinotora musanganiswa. Kana zviri mukati metsono-yakaita tsono uye flake aggregate inodarika 15%, iyo inoderedza mvura dosage inofanira kuwedzerwa ne10-15% kuve nechokwadi chekuvhara. Kuwedzera huwandu hwehukuru hweiyo coarse aggregate kubva pa20mm kusvika 31.5mm inoderedza void ratio, uye dosi inogona kuderedzwa ne5-8%.