SP-195: The Sixth Canmet/ACI Conference on Superplasticizers and Other Chemical Admixtures in Concrete最新文献

Effect of Type of Superplasticizer on loss of Workability of Self-Leveling Concrete 减水剂种类对自流平混凝土和易性损失的影响

SP-195: The Sixth Canmet/ACI Conference on Superplasticizers and Other Chemical Admixtures in Concrete Pub Date : 2000-07-01 DOI: 10.14359/9917

J. Ambroise, J. Pera

引用次数: 0

Influence of Temperature on Fluidity of Cement Paste Containing Superplasticizer with Polyethylene Oxide Graft Chains 温度对聚氧化物接枝减水剂水泥浆体流动性的影响

SP-195: The Sixth Canmet/ACI Conference on Superplasticizers and Other Chemical Admixtures in Concrete Pub Date : 2000-07-01 DOI: 10.14359/9912

T. Nawa, H. Ichiboji, M. Kinoshita

引用次数: 27

Electrosteric Repulsion Induced By Superplasticizers between Cement Particles-An Overlooked Mechanism? 超减水剂在水泥颗粒间引起的电斥力——一个被忽视的机制?

SP-195: The Sixth Canmet/ACI Conference on Superplasticizers and Other Chemical Admixtures in Concrete Pub Date : 2000-07-01 DOI: 10.14359/9903

R. Flatt, Y. F. Houst, P. Bowen, H. Hofmann

{"title":"Electrosteric Repulsion Induced By Superplasticizers between Cement Particles-An Overlooked Mechanism?","authors":"R. Flatt, Y. F. Houst, P. Bowen, H. Hofmann","doi":"10.14359/9903","DOIUrl":"https://doi.org/10.14359/9903","url":null,"abstract":"Synopsis: Dispersion mechanisms of superplasticizers have received much attention over the past years. Recent developments have brought very efficient superplasticizers where the dominant stabilizing mechanism is thought to be via steric repulsion. These new superplasticizers contain an adsorbing backbone onto which non adsorbing side chains are grafted with the objective of getting them to stretch out into the solution from the cement particle surface and induce the steric repulsion upon approach of other particles. Another feature of these polymers is that they induce only very small zeta potentials. Calculations of interaction energies indicate that these polymers act predominantly through steric repulsion. However, the same calculations could lead to the conclusion that all polymers can only act through steric repulsion. The calculation of the steric and electrostatic contributions are greatly dependent on the polymer adsorption conformation and the distribution of charge at the particle surface associated with these adsorbed polyelectrolytes. Many of the assumptions made in calculating interparticle forces are not necessarily good approximations for polyelectrolytes. This paper discusses the limits of the approximations currently used in such calculations and presents a more accurate model for the calculation of these forces. The main result, applicable for a wide range of superplasticizers, is that both electrostatic and steric repulsions should be taken into account, provided the electrostatic charge can be assumed to lie at the outer-bound of the adsorbed layer of superplasticizers. Such information is of primary importance for understanding and solving cement and superplasticizer incompatibilities, as well as for developing novel products.","PeriodicalId":408312,"journal":{"name":"SP-195: The Sixth Canmet/ACI Conference on Superplasticizers and Other Chemical Admixtures in Concrete","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133195957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 21

Evaluation of Effect of Chemical Admixture and Supplementary Cementitious Materials on Stability of Cement-Based Materials Using In-Situ Conductivity Method 用原位电导率法评价化学外加剂和补充胶凝材料对水泥基材料稳定性的影响

SP-195: The Sixth Canmet/ACI Conference on Superplasticizers and Other Chemical Admixtures in Concrete Pub Date : 2000-07-01 DOI: 10.14359/9929

C. Jolicoeur, K. Khayat, T. V. Pavate, M. Pagé

引用次数: 14

Interaction of Superplasticizers with Calcium Aluminate Cements 高效减水剂与铝酸钙水泥的相互作用

SP-195: The Sixth Canmet/ACI Conference on Superplasticizers and Other Chemical Admixtures in Concrete Pub Date : 2000-07-01 DOI: 10.14359/9907

H. Fryda, V. Gachet, P. Bost, K. Scrivener

引用次数: 12

Valorization of Modified Starch in Mortars 改性淀粉在砂浆中的增值作用

SP-195: The Sixth Canmet/ACI Conference on Superplasticizers and Other Chemical Admixtures in Concrete Pub Date : 2000-07-01 DOI: 10.14359/9904

J. Wolf, J. Pera

引用次数: 3

Effect of Welan Gum SuperplasticizerCombinations on Properties of Cement Grouts 惠兰胶高效减水剂组合对水泥浆液性能的影响

SP-195: The Sixth Canmet/ACI Conference on Superplasticizers and Other Chemical Admixtures in Concrete Pub Date : 2000-07-01 DOI: 10.14359/9916

K. Khayat, M. Saric-Coric

引用次数: 5

"In-Situ Conductivity Method for Monitoring Segregation, Bleeding, and Strength Development in Cement-Based Materials" 原位电导率法监测水泥基材料的离析、渗漏和强度发展

SP-195: The Sixth Canmet/ACI Conference on Superplasticizers and Other Chemical Admixtures in Concrete Pub Date : 2000-07-01 DOI: 10.14359/9933

T. V. Pavate, K. Khayat, C. Jolicoeur

引用次数: 14

Trends in Concrete Chemical Admixtures for the 21st Century 21世纪混凝土化学外加剂的发展趋势

SP-195: The Sixth Canmet/ACI Conference on Superplasticizers and Other Chemical Admixtures in Concrete Pub Date : 2000-07-01 DOI: 10.14359/9901

N. Spiratos, C. Jolicoeur

引用次数: 11

Development of New Superplasticizer and Its Application to Self-Compacting Concrete 新型高效减水剂的研制及其在自密实混凝土中的应用

SP-195: The Sixth Canmet/ACI Conference on Superplasticizers and Other Chemical Admixtures in Concrete Pub Date : 2000-07-01 DOI: 10.14359/9918

D. Hamada, T. Sato, F. Yamato, T. Mizunuma

引用次数: 15