Properties of lightweight concrete blocks with waste zeolitic tuff

Ilker Tekin,Osman Gencel,Turkay Kotan,Gonzalo Martinez-Barrera,Allison T Osmanson,Witold Brostow

doi:10.5755/j01.ms.26.4.22777

Abstract

In general, three different types of wall products commonly used in the building sector, namely traditional clay brick, lightweight concrete blocks and aerated concrete, are produced with pumice and perlite. We have created alternative block walls with Bayburt stone (BS) containing zeolite, namely lightweight concrete masonry blocks (LCMBs). BS was an aggregate, cement dosages ranging from 150 to 250 kg/m3 were a binder, 3 different type of superplasticizers were selected as a chemical additive. Compressive strength, water absorption, unit weight, elevated heat effect, freeze-thaw resistance, capillary water absorption and thermal conductivity tests were performed.

Highlights

The use of lightweight construction materials is very important – especially in earthquake zones
If pozzolanic material is used in a concrete along with steam curing between 60 to 80 °C, the concrete compressive strength can reach on 7th day 90 % of its value on 28th day [25]
Compressive strength of LWCB achieved to 8.9 MPa and 21.4 MPa at 3rd and 1800th days, respectively

Summary

Introduction

The use of lightweight construction materials is very important – especially in earthquake zones. Unit weights of concretes produced with lightweight aggregates range from 800 to 2000 kg/m3 [1]. Natural aggregates such as tuff and pumice are volcanic based and their densities varies between 0.65 and 1.85 g/cm due to high porosity [2]. 3 types of elements are used in building partition walls: traditional hollowed clay bricks, aerated concrete and hollowed cement based blocks produced with perlite or pumice. Each of these materials fulfills standards – with different geometrical shapes and predefined properties which differ from country to country. There have been around the world various studies aimed at decreasing unit weight and moisture permeability, increasing strength, enhancing radiation shielding capacity and freezing and thawing durability [3 – 11]

Objectives

Results

Conclusion