{"title":"Addition of superfine natural zeolite to improve rheological properties of self-consolidating concrete","authors":"J.J. Chen , G.X. Guan","doi":"10.1016/j.powtec.2025.120868","DOIUrl":null,"url":null,"abstract":"<div><div>A high packing density is essential to provide self-consolidating concrete (SCC) superior rheological performance. The superfine natural zeolite (SNZ), ground from natural zeolite to have a size finer than cement, can fill the voids between cement grains for packing density improvement. To evaluate the effect of SNZ on rheological properties and the effect of this change in rheological properties on flowability, a total of 28 concrete mixes with different SNZ contents at different paste volume were produced to test yield stress, apparent viscosity, pseudoplastic index, slump-flow and flow rate. The roles of yield stress and apparent viscosity on flowability of SNZ concrete were quantified. And, to reveal the causes of these effects of SNZ on rheological properties and flowability, the changes in packing density and film thicknesses of the concrete mixes were measured. The results disclosed that the effect of SNZ on rheological properties was dependent on the SNZ content and the paste volume. The SNZ affected the flowability through film thicknesses and consequently through rheological properties, and affected the pseudoplastic index mainly through packing density. Addition of 10 % SNZ increased the strength, decreased yield stress and apparent viscosity and slightly increased pseudoplastic index. It is concluded that SNZ has a potential to improve rheological properties to produce high-strength SCC.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"456 ","pages":"Article 120868"},"PeriodicalIF":4.5000,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Powder Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0032591025002633","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
A high packing density is essential to provide self-consolidating concrete (SCC) superior rheological performance. The superfine natural zeolite (SNZ), ground from natural zeolite to have a size finer than cement, can fill the voids between cement grains for packing density improvement. To evaluate the effect of SNZ on rheological properties and the effect of this change in rheological properties on flowability, a total of 28 concrete mixes with different SNZ contents at different paste volume were produced to test yield stress, apparent viscosity, pseudoplastic index, slump-flow and flow rate. The roles of yield stress and apparent viscosity on flowability of SNZ concrete were quantified. And, to reveal the causes of these effects of SNZ on rheological properties and flowability, the changes in packing density and film thicknesses of the concrete mixes were measured. The results disclosed that the effect of SNZ on rheological properties was dependent on the SNZ content and the paste volume. The SNZ affected the flowability through film thicknesses and consequently through rheological properties, and affected the pseudoplastic index mainly through packing density. Addition of 10 % SNZ increased the strength, decreased yield stress and apparent viscosity and slightly increased pseudoplastic index. It is concluded that SNZ has a potential to improve rheological properties to produce high-strength SCC.
期刊介绍：
Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests:
Formation and synthesis of particles by precipitation and other methods.
Modification of particles by agglomeration, coating, comminution and attrition.
Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces).
Packing, failure, flow and permeability of assemblies of particles.
Particle-particle interactions and suspension rheology.
Handling and processing operations such as slurry flow, fluidization, pneumatic conveying.
Interactions between particles and their environment, including delivery of particulate products to the body.
Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters.
For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.
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