Trwałość samozagęszczalnej zaprawy ze spoiwa wieloskładnikowego pod wpływem zewnętrznych czynników chemicznych

• Autorzy: Benguit Ammar , Boukhelkhal Aboubakeur , Azzouz Lakhdar

Identyfikatory

DOI

10.32047/CWB.2024.29.1.5

Warianty tytułu

EN

Durability of self-compacting mortar based on composite binder under external chemical attacks

• Języki publikacji: PL EN

Abstrakty

PL

Właściwości użytkowe betonów i zapraw są szczególnie powiązane z ich składem i stosunkiem wody do cementu. Zastosowanie cementu portlandzkiego [OPC] jako spoiwa zwiększa ciepło hydratacji i koszt cementu oraz emisję CO2. Zatem użytecznym rozwiązaniem może być zastosowanie spoiwa wieloskładnikowego poprzez zmniejszenie ilości OPC i wprowadzenie dodatków mineralnych. W tym badaniu OPC częściowo zastąpiono mączką marmurową [MP] w różnych proporcjach: 5, 10, 15 i 20% i zbadano wpływ MP na trwałość zapraw samozagęszczalnych [SCM] narażonych na agresję chemiczną. Zastosowano dwa roztwory korozyjne: siarczanu sodu [Na2SO4] i kwasu chlorowodorowego [HCl]. Stężenia roztworów wynosiły odpowiednio 5 i 1%. Wyniki wykazały, że zastosowanie proszku marmurowego korzystnie wpływa na poprawę odporności SCM na agresywne roztwory. Dodanie 20% MP zwiększyło odporność na działanie siarczanu sodu o 46% po 180 dniach. Stwierdzono, że stosowanie dodatku MP w zakresie od 10 do 20% zmniejsza utratę masy o 1 do 0,47%.

EN

The performance of concrete / mortar is specially related to their composition and water to cement ratio. The use of Ordinary Portland cement [OPC] as binder increases the hydration heat and cost of cement and CO2 emissions. So the use of composite binder by reducing the amount of OPC and introducing mineral additions can be a useful solution. In this study, OPC was partially substituted with marble powder [MP] at various percentages (5, 10, 15 and 20%) and the effect of MP on the durability of self compacting mortars [SCM] exposed to chemical aggressions was investigated. Two aggressive solutions were used sodium sulfate [Na2SO4] and hydrochloric acid [HCl]. The dosages of the solutions were 5 and 1%, respectively. The results revealed that the use of marble powder is beneficial for improving the resistance of SCM to aggressive solutions. Adding 20% MP increased the resistance against sodium sulfate attack by 46% at 180 days. Using MP with content ranged between 10 to 20% was found to reduce mass loss by 1 to 0.47%.

Słowa kluczowe

PL

zaprawa samozagęszczalna; spoiwo wieloskładnikowe; środowisko agresywne; wytrzymałość; ubytek masy; czynnik zewnętrzny

EN

self-compacting mortar; multi-component binder; aggressive environments; strength; mass loss; external factor

• Wydawca: Fundacja Cement, Wapno, Beton
• Czasopismo: Cement Wapno Beton
• Rocznik: 2024
• Tom: R. 29, nr 1
• Strony: 71--81
• Opis fizyczny: Bibliogr. 23 poz., il., tab.

Twórcy

autor

Benguit Ammar

• Structure Rehabilitation and Materials Laboratory, University of Amar Telidji, Laghouat, Algeria

autor

Boukhelkhal Aboubakeur

• Research Laboratory of Civil Engineering, University of Amar Telidji, Laghouat, Algeria

autor

Azzouz Lakhdar

• Research Laboratory of Civil Engineering, University of Amar Telidji, Laghouat, Algeria

Bibliografia

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