Ogologo oge ole ka kọnkịtị na-ewe iji kpoo nkụ?

Ntuziaka zuru oke maka ihicha na ọgwụgwọ ihe: Site na ịwụsa ruo ike zuru oke

Ihe siri ikebụ otu n'ime ihe owuwu a na-ejikarị eme ihe n'ụwa niile, nke a na-akwanyere ùgwù maka ịdịte aka ya, ịdịte aka ya na ọnụ ahịa ya. Otú ọ dị, arụmọrụ ya na-adabere na ihicha na ọgwụgwọ kwesịrị ekwesị-usoro a na-aghọtahiekarị ma ọ bụ mgbagwoju anya. Ntuziaka okwu 3,000 a na-abanye na sayensị, usoro iheomume, na omume kachasị mma maka ihicha, ịgwọ ọrịa, na inweta ike kacha mma.

1. Ịghọta ihe "ịkpọ nkụ" vs. Ịgwọ

Tupu enyocha usoro iheomume, ọ dị mkpa ịmata ọdịiche dị n'etitiihicha(evaporation nke mmiri) naọgwụgwọ(hydration nke ciment).

• Ịkpọ nkụ: Na-ezo aka na evaporation nke ngafe mmiri si ihe n'elu. Ọ bụ ezie na mmiri dị n'elu nwere ike ịpụ n'anya n'ime awa ole na ole, mmiri dị n'ime nwere ike ịdịgide ruo izu.
• Ngwọta: Usoro kemịkalụ ebe mmiri na-emeghachi omume na irighiri ciment (hydration), na-eme njikọ na-eme ka ihe sie ike. Ngwọta nke ọma na-eme ka ike, ịdịte aka, na iguzogide mgbawa.

Ntugharị igodo: Concrete anaghị 'akpọnwụ' n'echiche ọdịnala - ọ na-agwọ ya site na hydration, nke chọrọ ijide mmiri.

2. Nkeji nke Concrete Setting na Hardening

Usoro iheomume site na ịwụsa ruo ike zuru oke gụnyere usoro dị iche iche:

Nkeji 1: Ntọala izizi (awa 2–6)

• Concrete ntughari site na mmiri mmiri ruo ọkara siri ike.
• Ịga ije: Ofefe ụkwụ dị mfe nwere ike ime ka awa 24-48 gachara.

Nkeji 2: Ntọala ikpeazụ (awa 6–12)

• N'elu na-esi ike nke ọma iji guzogide obere indentations.
• Enwere ike iwepụ ihe arụrụ arụ, mana kọnkịtị ka na-adị mfe.

Nkeji 3: Ike mmalite (1–7 ụbọchị)

• Na-enweta ~ 70% nke ike imewe na ụbọchị 7 (maka ngwakọta ọkọlọtọ).
• Nchekwa maka ụgbọ ala ọkụ (dịka ọmụmaatụ, ụgbọ ala) ka ụbọchị 7 gachara.

Nkeji 4: Ngwọta zuru oke (ụbọchị 28)

• Ụkpụrụ ụlọ ọrụ maka "ike zuru oke" (ike imewe 100%).
• Enwere ike ikwe ka igwe dị arọ na ibu arụrụ arụ.

Nkeji 5: Mmiri na-adị ogologo oge (Ọnwa ruo n'afọ)

• Concrete na-aga n'ihu na-esi ike na ọnụ ọgụgụ dị nwayọọ ruo ọtụtụ afọ.

3. Ihe na-emetụta ihicha na ọgwụgwọ oge

Usoro iheomume dịgasị iche dabere na ọnọdụ gburugburu ebe obibi, nhazi agwakọta, na nkọwapụta ọrụ:

A. Ihe gbasara gburugburu ebe obibi

1. Okpomọkụ:
   • Oke kacha mma: 50–90°F (10–32°C).
   • Ihu igwe oyi (<50°F): Na-ebelata hydration; chọrọ mkpuchi ma ọ bụ mkpuchi ọkụ.
   • Ihu igwe na-ekpo ọkụ (>90°F): Na-eme ka ihicha elu dị ngwa ngwa, na-etinye ihe mgbawa. Jiri misting ma ọ bụ ndò.
2. iru mmiri:
   • Igwe iru mmiri dị elu na-ebelata evaporation, na-enyere hydration aka.
   • Iru mmiri dị ala na-eme ka ihicha elu dị ngwa ngwa, na-eme ka a gwọọ akpụkpọ ahụ.
3. Ifufe: Na-abawanye ọnụego evaporation, na-eduga na mgbawa plastik shrinkage.

B. Concrete Mix Design

1. Mmiri-Cment Ratio: Ọnụ ọgụgụ dị ala (0.4-0.6) na-eme ka uru ike dịkwuo elu mana ọ chọrọ ọgwụgwọ nke ọma.
2. Admixtures:
   • Ndị na-eme ngwa ngwa(dịka ọmụmaatụ, calcium chloride): Belata oge nhazi.
   • Ndị na-azụ azụ: Ntọala igbu oge na ihu igwe na-ekpo ọkụ.
   • Ndị Pozzola(ash na-efe efe, uzuoku silica): Nweta ike mmalite nwayọ mana kwalite ogologo oge.
3. Ụdị ihe:
   • Ihe dị elu-Obere-ike: Na-enweta 3,000 psi n'ime awa 24.
   • Ngwakọta ọkọlọtọ: 3,000–4,000 psi na ụbọchị 28.

C. Nkọwapụta oru ngo

1. Ọkpụrụkpụ slab: Akụkụ ndị dị arọ na-ejigide mmiri ogologo oge, na-ebelata ihicha elu.
2. Nkwanye: Mgbochi ígwè ma ọ bụ ntupu nwere ike ọnyà mmiri, na-emetụta ịdị n'otu.

4. Ụzọ ọgwụgwọ iji bulie ike

Ngwọta na-ejigide mmiri maka hydration. Usoro ndị a na-ahụkarị gụnyere:

1. Ngwọta mmiri:
   • Ntụgharị, fesa, ma ọ bụ mkpuchi mkpuchi mmiri (opekempe ụbọchị 7).
   • Kwesịrị ekwesị maka ihe nhazi dị ka ogwe na ogidi.
2. Ngwakọta ndị na-emepụta mkpụrụ ndụ:
   • Ihe mkpuchi na-efesa na-ebelata evaporation.
   • Eji maka slabs na pavement.
3. Na-ekpuchi ya na Plastic/ Tarps:
   • Ọnyà mmiri; chọrọ wetting oge.
4. Ngwọta Steam:
   • Accelerates ike uru na precast ihe (dịka, 18-24 awa).

5. Nnwale ihe njikere

1. Nnwale isi ike dị n'elu:
   • Nnwale mkpịsị aka mkpịsị aka: Enweghị nbanye mgbe ejiri mkpịsị aka pịa ya.
   • Nnwale cratch: Nguzogide nke screwdriver ma ọ bụ ntu.
2. Nnwale ike mkpakọ:
   • A nwalere nlele cylinder na ụbọchị 7 na 28 na ụlọ nyocha.
3. Mita mmiri:
   • Tụọ ọdịnaya mmiri dị n'ime (<4% maka nrụnye ala).

6. Mmejọ a na-emekarị na otu esi ezere ha

• Na-ebubata ngwa ngwa: Zere ibu dị arọ tupu ụbọchị 28.
• Ngwọta ezughị oke: Na-eduga n'ụzuzu uzuzu, ihicha, na mbelata ịdịte aka.
• Na-agbabiga mmiri ókè: Na-ebelata oyi akwa elu.

7. Okwu pụrụ iche na FAQ

• Ihu igwe oyi: Jiri akwa mkpuchi mkpuchi ma ọ bụ mkpuchi ọkụ.
• Ngosipụta mmiri ozuzo: Chebe ihe ọhụrụ na tarps; mmiri ozuzo mgbe 4-8 awa bụ obere emerụ.
• Ngwa-ngwa-ngwa oru ngo: Jiri ngwakọta ike mmalite dị elu ma ọ bụ ọgwụgwọ uzuoku.

Ihe siri ikeUsoro iheomume nke “ihicha” na-ewe awa maka ikuku ikuku mana ọ chọrọ ụbọchị 28 iji nweta ike imewe. Ngwọta nke ọma bụ enweghị nkwekọrịta maka ịdịte aka, yana a ghaghị ijikwa ihe ndị metụtara gburugburu ebe obibi nke ọma. Site n'ịghọta sayensị hydration na iji omume kachasị mma, ndị ọrụ ngo na ndị na-eme N'onwe Gị nwere ike hụ na ihe arụrụ arụ na-adịte aka.