Alkali-activated cement based on natural SiO2-containing material: Part I. Strength, hydration, microstructure and durability

C. Freidin

doi:10.1016/S0008-8846(03)00088-7

Alkali-activated cement based on natural SiO₂-containing material: Part I. Strength, hydration, microstructure and durability

C. Freidin

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

An alkali-activated cement (AAC) based on natural SiO ₂-containing materials - grounded porcellanite (Pr) and highly dispersed pure quartz sand - was examined. Sodium hydroxide was used as an alkali activator. The pressed specimens were prepared and were cured in an autoclave at a pressure of 1.6 MPa and a temperature of 205 °C. It was shown that the strength of cement as well as compound and the microstructure of its hydration products depend on the cement composition. It was distinguished that autoclave-cured cementing matter comprises secondary quartz and the mass of sodium hydrated silicates along with the initial Pr crystal phases. After a 2-year storage under water, 15% Na₂SO₄, and Dead Sea water, the strength of specimens decreased by 17.5-20%. Control specimens, prepared with Portland cement and immersed in a 15% Na₂SO ₄ solution for 2 weeks, were broken up completely. Positive results of long-term durable tests suggest that an AAC based on natural raw material would be stable in other salt solutions.

Original language	English
Pages (from-to)	1417-1422
Number of pages	6
Journal	Cement and Concrete Research
Volume	33
Issue number	9
DOIs	https://doi.org/10.1016/S0008-8846(03)00088-7
State	Published - 1 Sep 2003

Keywords

Alkali-activated cement
Durability
Hydration product
Mechanical properties

ASJC Scopus subject areas

Building and Construction
General Materials Science

Access to Document

10.1016/S0008-8846(03)00088-7

Cite this

@article{7bae358471524038a32c2315428d9fe5,

title = "Alkali-activated cement based on natural SiO2-containing material: Part I. Strength, hydration, microstructure and durability",

abstract = "An alkali-activated cement (AAC) based on natural SiO 2-containing materials - grounded porcellanite (Pr) and highly dispersed pure quartz sand - was examined. Sodium hydroxide was used as an alkali activator. The pressed specimens were prepared and were cured in an autoclave at a pressure of 1.6 MPa and a temperature of 205 °C. It was shown that the strength of cement as well as compound and the microstructure of its hydration products depend on the cement composition. It was distinguished that autoclave-cured cementing matter comprises secondary quartz and the mass of sodium hydrated silicates along with the initial Pr crystal phases. After a 2-year storage under water, 15% Na2SO4, and Dead Sea water, the strength of specimens decreased by 17.5-20%. Control specimens, prepared with Portland cement and immersed in a 15% Na2SO 4 solution for 2 weeks, were broken up completely. Positive results of long-term durable tests suggest that an AAC based on natural raw material would be stable in other salt solutions.",

keywords = "Alkali-activated cement, Durability, Hydration product, Mechanical properties",

author = "C. Freidin",

year = "2003",

month = sep,

day = "1",

doi = "10.1016/S0008-8846(03)00088-7",

language = "English",

volume = "33",

pages = "1417--1422",

journal = "Cement and Concrete Research",

issn = "0008-8846",

publisher = "Elsevier Ltd.",

number = "9",

}

TY - JOUR

T1 - Alkali-activated cement based on natural SiO2-containing material

T2 - Part I. Strength, hydration, microstructure and durability

AU - Freidin, C.

PY - 2003/9/1

Y1 - 2003/9/1

N2 - An alkali-activated cement (AAC) based on natural SiO 2-containing materials - grounded porcellanite (Pr) and highly dispersed pure quartz sand - was examined. Sodium hydroxide was used as an alkali activator. The pressed specimens were prepared and were cured in an autoclave at a pressure of 1.6 MPa and a temperature of 205 °C. It was shown that the strength of cement as well as compound and the microstructure of its hydration products depend on the cement composition. It was distinguished that autoclave-cured cementing matter comprises secondary quartz and the mass of sodium hydrated silicates along with the initial Pr crystal phases. After a 2-year storage under water, 15% Na2SO4, and Dead Sea water, the strength of specimens decreased by 17.5-20%. Control specimens, prepared with Portland cement and immersed in a 15% Na2SO 4 solution for 2 weeks, were broken up completely. Positive results of long-term durable tests suggest that an AAC based on natural raw material would be stable in other salt solutions.

AB - An alkali-activated cement (AAC) based on natural SiO 2-containing materials - grounded porcellanite (Pr) and highly dispersed pure quartz sand - was examined. Sodium hydroxide was used as an alkali activator. The pressed specimens were prepared and were cured in an autoclave at a pressure of 1.6 MPa and a temperature of 205 °C. It was shown that the strength of cement as well as compound and the microstructure of its hydration products depend on the cement composition. It was distinguished that autoclave-cured cementing matter comprises secondary quartz and the mass of sodium hydrated silicates along with the initial Pr crystal phases. After a 2-year storage under water, 15% Na2SO4, and Dead Sea water, the strength of specimens decreased by 17.5-20%. Control specimens, prepared with Portland cement and immersed in a 15% Na2SO 4 solution for 2 weeks, were broken up completely. Positive results of long-term durable tests suggest that an AAC based on natural raw material would be stable in other salt solutions.

KW - Alkali-activated cement

KW - Durability

KW - Hydration product

KW - Mechanical properties

UR - http://www.scopus.com/inward/record.url?scp=0041942678&partnerID=8YFLogxK

U2 - 10.1016/S0008-8846(03)00088-7

DO - 10.1016/S0008-8846(03)00088-7

M3 - Article

AN - SCOPUS:0041942678

SN - 0008-8846

VL - 33

SP - 1417

EP - 1422

JO - Cement and Concrete Research

JF - Cement and Concrete Research

IS - 9

ER -