Ekonomiczny kompozyt cementowy EKC przygotowany z drobnego piasku kwarcowego i nominalnej ilości włókien PVA

Khan, Fasih Ahmed; Khan, Sajjad Wali; Said, Imad; Hussain, Shabir

doi:10.32047/CWB.2021.26.4.5

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Tytuł artykułu

Ekonomiczny kompozyt cementowy EKC przygotowany z drobnego piasku kwarcowego i nominalnej ilości włókien PVA

Autorzy

Khan Fasih Ahmed , Khan Sajjad Wali , Said Imad , Hussain Shabir

Wybrane pełne teksty z tego czasopisma

http://www.cementwapnobeton.pl/

Identyfikatory

DOI

10.32047/CWB.2021.26.4.5

Warianty tytułu

An Economical Engineered Cementitious Composite (ECC) prepared with fine quarry sand and a nominal amount of PVA fibers

Języki publikacji

PL EN

Abstrakty

Do produkcji konwencjonalnych kompozytów cementowych [KKC] zużywa się niewielką ilość drogiego, najdrobniejszego piasku kwarcowego [BDPK] o maksymalnej wielkości 250 μm, co negatywnie wpływa na skurcz przy wysychaniu, koszt i praktyczne zastosowanie KKC. W niniejszej pracy opracowano ekonomiczny kompozyt EKC. Wykorzystano zwykły piasek z piaskowni [PP], o niższym wskaźniku miałkości – WM = 2,2 i maksymalnej wielkości ziarna 2350 μm. Wielkość ziaren piasku z piaskowni była dziesięciokrotnie większa, a cena 30.-krotnie niższa niż BDPK. Doświadczalnie wykazano, że EKC, otrzymany z PP wykazuje zjawisko umocnienia odkształceniowego, z wieloma pęknięciami przed zniszczeniem. Sprawdzono również zachowanie się PP w różnych warunkach temperaturowych i stwierdzono niewielki spadek gęstości i wytrzymałości na ściskanie, do temperatury 200°C. Po przekroczeniu temperatury 200°C stwierdzono znaczny spadek wytrzymałości na ściskanie, spowodowany topnieniem włókien poliwinylowych PVA.

The production of conventional engineered cementitious composites – ECC consumes low-volume and expensive ultrafine silica sand [UFSS] – maximum size 250 μm, which negatively affecting dry shrinkage, cost and practical application of ECC. This study develops an economical ECC featuring ordinary quarry sand [QS] with a lower fineness modulus – FM = 2.2 and a maximum particle size of 2350 μm. The quarry sand particle size was ten times greater, and the price was 30 times lower than UFSS. The experimental finding was shown that ECC prepared with QS exhibited the strain hardening phenomenon, with multiple cracks produced, before failure. The performance of QS was also checked under different temperature regimes, and a minor decrease in the mass density and compressive strength was observed, up to 200°C. After 200°C, a significant decrease in compressive strength was found, due to the melting of the PVA fibers.

Słowa kluczowe

kompozyt cementowy beton ekspozycja na ogień naprężenie-odkształcenie beton plastyczny włókno poliwinylowe piasek kwarcowy

engineered composite cementitious composite concrete fire exposure stress-strain ductile concrete polyvinyl fiber fine quarry sand

Wydawca

Fundacja Cement, Wapno, Beton

Czasopismo

Cement Wapno Beton

Rocznik

2021

Tom

R. 26, nr 4

Strony

323--339

Opis fizyczny

Bibliogr. 50 poz., il., tab.

Twórcy

autor

Khan Fasih Ahmed

fasihahmad@uetpeshawar.edu.pk

Department of Civil Engineering, University of Engineering & Technology, Peshawar, Pakistan

autor

Khan Sajjad Wali

Department of Civil Engineering, University of Engineering & Technology, Peshawar, Pakistan

autor

Said Imad

Department of Civil Engineering, University of Engineering & Technology, Peshawar, Pakistan

autor

Hussain Shabir

Department of Civil Engineering, University of Engineering & Technology, Peshawar, Pakistan

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