NDLI: Statistical justification of Model B4 for drying and autogenous shrinkage of concrete and comparisons to other models

Content Provider	Springer Nature Link
Author	Hubler, Mija H. Wendner, Roman Bažant, Zdeněk P.
Copyright Year	2015
Abstract	The shrinkage prediction part of Model B4 presented in the preceding paper is here statistically justified by optimal fitting of the new NU database containing 1050 test curves and by statistical comparisons with the existing shrinkage prediction models. Rather than attempting a point-wise constitutive model for free shrinkage, Model B4 predicts the average shrinkage of cross sections of long members, which are affected by nonuniform residual stresses relaxing due to creep and microcracking. The main improvement in Model B4, which extends the 1995 Model B3 (a RILEM recommendation), is that separate formulae are given for: (1) the drying shrinkage, which represents most of the shrinkage observed in normal concretes of high water–cement ratios, and (2) for the autogenous shrinkage, which has a different physical mechanism and is important for modern high-performance concretes with admixtures, additives and low water–cement ratios. The effect of elevated temperature on the shrinkage rate is captured through an equivalent accelerated time based on activation energy. Model B4 is statistically calibrated by the new NU database of laboratory shrinkage tests through a sequential optimization procedure which isolates different physical behaviors. The new shrinkage equations are shown to match the time curves of individual shrinkage tests well, and fit the database with minimum error. Statistics of extensive comparisons with Model B3 and with the models of various engineering societies, including those of ACI and fib, document a superior fit of the new model to the database.
Starting Page	797
Ending Page	814
Page Count	18
File Format	PDF
ISSN	13595997
Journal	Materials and Structures
Volume Number	48
Issue Number	4
e-ISSN	18716873
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-01-08
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Shrinkage Concrete Prediction Database Calibration Statistical comparisons Structural Mechanics Materials Science Theoretical and Applied Mechanics Operating Procedures, Materials Treatment Civil Engineering Building Materials
Content Type	Text
Resource Type	Article
Subject	Building and Construction Mechanics of Materials Materials Science Civil and Structural Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Statistical justification of model B4 for multi-decade concrete creep using laboratory and bridge databases and comparisons to other models

Effect of drying conditions on autogenous shrinkage in ultra-high performance concrete at early-age

RILEM draft recommendation: TC-242-MDC multi-decade creep and shrinkage of concrete: material model and structural analysis* : Model B4 for creep, drying shrinkage and autogenous shrinkage of normal and high-strength concretes with multi-decade applicability

Corrugated tube protocol for autogenous shrinkage measurements: review and statistical assessment

Modeling of drying shrinkage of concrete specimens at the meso-level

Statistical justification of Model B4 for drying and autogenous shrinkage of concrete and comparisons to other models

Short-term experimental data of drying shrinkage of ground granulated blast-furnace slag cement concrete

Cracking in cement paste induced by autogenous shrinkage

Prediction of moisture curling of concrete slab

Statistical justification of Model B4 for drying and autogenous shrinkage of concrete and comparisons to other models

Similar Documents

Statistical justification of model B4 for multi-decade concrete creep using laboratory and bridge databases and comparisons to other models

Effect of drying conditions on autogenous shrinkage in ultra-high performance concrete at early-age

RILEM draft recommendation: TC-242-MDC multi-decade creep and shrinkage of concrete: material model and structural analysis* : Model B4 for creep, drying shrinkage and autogenous shrinkage of normal and high-strength concretes with multi-decade applicability

Corrugated tube protocol for autogenous shrinkage measurements: review and statistical assessment

Modeling of drying shrinkage of concrete specimens at the meso-level

Statistical justification of Model B4 for drying and autogenous shrinkage of concrete and comparisons to other models

Short-term experimental data of drying shrinkage of ground granulated blast-furnace slag cement concrete

Cracking in cement paste induced by autogenous shrinkage

Prediction of moisture curling of concrete slab

Statistical justification of Model B4 for drying and autogenous shrinkage of concrete and comparisons to other models