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A platform for research: civil engineering, architecture and urbanism
Studying effects of chemical admixtures on the workability retention of zeolitic Portland cement mortar
https://orcid.org/0000-0002-9855-1606
Highlights Compatibility of zeolitic cement with three superplasticizers was studied. Workability retention of zeolitic cement incorporating superplasticizers and retarder were studied. Reduction in the amount of electrostatic charge occurred as a result of NZ inclusion. The influential mechanisms were recognized for the three superplasticizers. Workability loss of NZ mortars is highly dependent to the “free” admixture dosage.
Abstract In this paper, the effects of three superplasticizers, namely, poly-carboxylate ether, calcium ligno-sulfonate, and Naphthalene Sulfonate Formaldehyde, on the workability retention of NZ blended mortars were investigated. In addition, simultaneous inclusion of either tripolyphosphate type retarder or Na2SO4 admixtures was examined as a measure to mitigate the workability loss of NZ blended mortars. Thereafter, the compatibility of zeolitic cement with three different superplasticizers was studied in more details by performing adsorption isotherm test, zeta potential test and also pH measurement of pastes at different time intervals. Obtained results indicated that for ligno-sulfonate and naphthalene sulfonate superplasticizers, reduction in the amount of electrostatic charge (which occurred by NZ inclusion) is an influential parameter contributing to the higher workability loss. On the other hand, for poly-carboxylate ether admixture, the results implied that the significantly high polymer adsorption is the major reason for the observed workability loss of NZ blended mortars.
Studying effects of chemical admixtures on the workability retention of zeolitic Portland cement mortar
https://orcid.org/0000-0002-9855-1606
Highlights Compatibility of zeolitic cement with three superplasticizers was studied. Workability retention of zeolitic cement incorporating superplasticizers and retarder were studied. Reduction in the amount of electrostatic charge occurred as a result of NZ inclusion. The influential mechanisms were recognized for the three superplasticizers. Workability loss of NZ mortars is highly dependent to the “free” admixture dosage.
Abstract In this paper, the effects of three superplasticizers, namely, poly-carboxylate ether, calcium ligno-sulfonate, and Naphthalene Sulfonate Formaldehyde, on the workability retention of NZ blended mortars were investigated. In addition, simultaneous inclusion of either tripolyphosphate type retarder or Na2SO4 admixtures was examined as a measure to mitigate the workability loss of NZ blended mortars. Thereafter, the compatibility of zeolitic cement with three different superplasticizers was studied in more details by performing adsorption isotherm test, zeta potential test and also pH measurement of pastes at different time intervals. Obtained results indicated that for ligno-sulfonate and naphthalene sulfonate superplasticizers, reduction in the amount of electrostatic charge (which occurred by NZ inclusion) is an influential parameter contributing to the higher workability loss. On the other hand, for poly-carboxylate ether admixture, the results implied that the significantly high polymer adsorption is the major reason for the observed workability loss of NZ blended mortars.
Studying effects of chemical admixtures on the workability retention of zeolitic Portland cement mortar
https://orcid.org/0000-0002-9855-1606
Highlights Compatibility of zeolitic cement with three superplasticizers was studied. Workability retention of zeolitic cement incorporating superplasticizers and retarder were studied. Reduction in the amount of electrostatic charge occurred as a result of NZ inclusion. The influential mechanisms were recognized for the three superplasticizers. Workability loss of NZ mortars is highly dependent to the “free” admixture dosage.
Abstract In this paper, the effects of three superplasticizers, namely, poly-carboxylate ether, calcium ligno-sulfonate, and Naphthalene Sulfonate Formaldehyde, on the workability retention of NZ blended mortars were investigated. In addition, simultaneous inclusion of either tripolyphosphate type retarder or Na2SO4 admixtures was examined as a measure to mitigate the workability loss of NZ blended mortars. Thereafter, the compatibility of zeolitic cement with three different superplasticizers was studied in more details by performing adsorption isotherm test, zeta potential test and also pH measurement of pastes at different time intervals. Obtained results indicated that for ligno-sulfonate and naphthalene sulfonate superplasticizers, reduction in the amount of electrostatic charge (which occurred by NZ inclusion) is an influential parameter contributing to the higher workability loss. On the other hand, for poly-carboxylate ether admixture, the results implied that the significantly high polymer adsorption is the major reason for the observed workability loss of NZ blended mortars.
Studying effects of chemical admixtures on the workability retention of zeolitic Portland cement mortar
AzariJafari, Hessam (author) / Kazemian, Ali (author) / Ahmadi, Babak (author) / Berenjian, Javad (author) / Shekarchi, Mohammad (author)
Construction and Building Materials ; 72 ; 262-269
2014-09-15
8 pages
Article (Journal)
Electronic Resource
English
Workability of Portland Cement in Mortar and Concrete
| British Library Online Contents | 1997
PLASTICISING ADMIXTURES - EFFECTS ON WORKABILITY RETENTION
| British Library Conference Proceedings | 1995
Latex Admixtures for Portland Cement Concrete and Mortar
| NTIS | 1986