The Business Case for Slag

Presentation Transcript

The Business Case for Slag Daksh Baweja Principal Engineer Rinker Australia Peter Ney Technical Services Manager Readymix

Highlights We have known for quite a while the advantages of slag in solid Now broadly utilized Concern over progressing slag supply ability of our industry Slags give answers for future difficulties To address supportability and different difficulties we require New techniques for plan/detail of solid structures Better approaches to control constructional prerequisites

Summary Slag – how was it utilized Usage information from 1980's as a part of Australia and abroad R&D on slag solid structures Current Use Future issues Construction and outline of structures Sustainable improvement Slag situating

Use of GGBFS in Concrete (1986) (After Malhotra – SCM's Review of North American Experience Concrete Workshop 88)

Estimated Sales of GGBFS for Concrete (After Ryan – SCM's Review of Australian Experience – Concrete Workshop 88)

What Was Happening with Slag in Concrete in Early 1990's Many R&D programs under path Durability of cement a major issue in outline and research CSIRO and others doing critical research into slag and SCM's A major push to make attention to the item in the market Hinczak Jones Sirivivatnanon and Cao ASA propelled in 1991

Where Was Slag Used? Prior Australian Studies

Slag Concretes Investigated Earlier Australian Studies

Concrete Data After Long-Term Service

How Were Slag Concretes Performing? Comes about because of 1990 Slag cements performed to a great degree very much contrasted and portland bond cements Major reasons for issues was low indicated qualities Knowledge of sturdiness not accessible when structures built Clearly, slag had a place in solid development

GGBFS Today Used both as Blended bond and Direct expansion to concrete blends Often utilized as a part of conjunction with other SCM's Used in Normal Class and Special Class cements Used as a fastener and total

GGBFS Extensively utilized NSW Western Australia Used ordinarily Victoria Queensland Specifiers Recognition of item and what it can do Slag Aggregates Used where accessible Incorporated into AS2758.1 Benefits perceived by a few specifiers Slag in Concrete

Normal-Class Concrete 20 MPa to 50 MPa Slump 20 mm to 120 mm Agg estimate: 10 mm, 14 mm or 20 mm Density: 2100 to 2800 kg/m 3 AEA: Up to 5% 60% by volume Special-Class Concrete Addresses particular plan prerequisite More mind boggling Testing necessities should be determined in outline f'c and droop (two noteworthy parameters) AS3600 and AS1379

What Drives Concrete Specifications and Use Design necessities Compressive quality (f'c) Mechanical properties Durability properties Constructional necessities Pumping necessities Placement necessities Finishing prerequisites Above necessities characterize materials Binders (like slag) Aggregates (counting slag)

Current Issues with Slag and Concrete Construction driving the motivation more Areas were more data is required Sustainable advancement Rating frameworks Lack of learning (storehouses) Early age conduct of solid More improved development Management of serviceability issues Need to comprehend administrative system of cement (and slag) in development

State enactment (oversees building) Regulations & Codes Provide exhortation Legally enforceable Cover things like OH&S Building Code of Australia Standards Represent great practice (least) Two sorts Primary (rang by control) Secondary (rang by essential record) Guidelines Advisory Overcome handy issues Can have lawful impact Legislation, Codes, Standards & Guidelines

Building Code of Australia

Building Code of Australia General Provisions

Building Code of Australia Structure

Structure Types in AS3600

AS3600 Supplement 1 AS3600 Design of Concrete AS1379 Supply of Concrete AS1379 Supplement 1 AS1012 Concrete AS3972 Cement AS3582 Supplementary Cementitious Materials AS2758 Aggregates AS1478 Admixtures Sampling and Testing Constituent Materials Concrete Standards Roadmap AS3600 and AS1379 under audit

Sustainable Development Where to next? Current rating frameworks have noteworthy issues Building texture complex Requirements administered Lot of information and learning Not reflected in frameworks Need an outline structure to consider the numerous elements Need a comparative system to consider constructional necessities This should be monetarily suitable

Business Case for Slag We knew quite a while back that it was a material of chance Now generally utilized Can give answers for future issues To address supportability and different difficulties, new plan and constructional systems required Need steady supply of material