Preliminary Mix Design Procedure for Alkali Activated Cement Mortars Based on Metakaolin and Industrial Waste Products Activated With Potasium Silicate

Oakes, Luke; Wilkinson, Allistair; Magee, Bryan

doi:10.1002/9781119543381.ch19

Cited by 1 publication

(1 citation statement)

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“…Investigated were binder combinations GGBS + FA, GGBS + FA + MK, and GGBS + FA + MK + SF with liquid-to-solid (LS) ratios ranging from 0.27-0.52. Based on previous related research [31], these binder combinations were chosen to offer a range of grout performance levels in terms of flow, setting time, and compressive strength, appropriate for a range of potential SFC pavement applications.…”

Section: Geopolymer Groutsmentioning

confidence: 99%

A Preliminary Characterisation of Innovative Semi-Flexible Composite Pavement Comprising Geopolymer Grout and Reclaimed Asphalt Planings

2020

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This article considers semi-flexible composite (SFC) pavement materials made with reclaimed asphalt planings (RAP) and geopolymer cement-based grouts. Geopolymer grouts were developed and used to fill the internal void structure of coarse RAP skeletons with varying levels of porosity. The geopolymer grouts were formulated at ambient temperature using industrial by-products to offer economic and environmental savings relative to conventional Portland cement-based grouting systems. They were characterised on flowability, setting time, and compressive strength. The effect of grout and RAP on SFC material performance was evaluated using permeable porosity, compressive strength, and ultrasonic pulse velocity. SFC performance was significantly influenced by both grout type and RAP content. Improved performance was associated with mixtures of high-flowability/high-strength grout and low RAP content. A practical limitation was identified for combination of grout with low-flowability/fast-setting time and well-compacted RAP skeletons. Solids content exceeding 49% by volume was not feasible, owing to inadequate grout penetration. A suite of SFC materials was produced offering performance levels for a range of practical pavement applications. Preliminary relationships enabling prediction of SFC elastic modulus based on strength and/or ultrasonic pulse velocity test data are given. A pavement design is given using SFC as a sub-base layer for an industrial hardstanding.

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Section: Geopolymer Groutsmentioning

confidence: 99%