The effect of chemical admixtures and mineral additives on the properties of self-compacting mortars

Sahmaran, M
Christianto, HA
Yaman, İsmail Özgür
Mortar serves as the basis for the workability properties of self-compacting concrete (SCC) and these properties could be assessed by self-compacting mortars (SCM). In fact, assessing the properties of SCM is an integral part of SCC design. The objective of this study was to evaluate the effectiveness of various mineral additives and chemical admixtures in producing SCMs. For this purpose, four mineral additives (fly ash, brick powder, limestone powder, and kaolinite), three superplasticizers (SP), and two viscosity modifying admixtures (VMA) were used. Within the scope of the experimental program, 43 mixtures of SCM were prepared keeping the amount of mixing water and total powder content (portland cement and mineral additives) constant. Workability of the fresh mortar was determined using mini V-funnel and mini slump flow tests. The setting time of the mortars, were also determined. The hardened properties that were determined included ultrasonic pulse velocity and strength determined at 28 and 56 days. It was concluded that among the mineral additives used, fly ash and limestone powder significantly increased the workability of SCMs. On the other hand, especially fly ash significantly increased the setting time of the mortars, which can, however, be eliminated through the use of ternary mixtures, such as mixing fly ash with limestone powder. The two polycarboxyl based SPs yield approximately the same workability and the melamine formaldehyde based SP was not as effective as the other two.


Effect of alkali-silica reaction expansion on mechanical properties of concrete
Hafçı, Alkan; Turanlı, Lütfullah; Department of Civil Engineering (2013)
Alkali-silica reaction (ASR) is a chemical deterioration process which arises in concrete due to reactive aggregate from its constituent, sufficient alkalis from cement or external resources and humidity about 85%. ASR gel, formed by the reaction, absorbs water and expands so that it causes expansion and cracking in concrete. ASR has detrimental effects on mechanical properties of concrete. Therefore, ASR which is a long and a constantly progressive reaction may become a threat to the safety of concrete str...
Effect of chemical and mineral admixtures on the fresh properties of self compacting mortars
Christianto, Heru Ari; Yaman, İsmail Özgür; Department of Civil Engineering (2004)
Fresh properties of mortars are important factors in altering the performance of self compacting concrete (SCC). Measurement of the rheological properties of the fine mortar part of concrete is generally used in the mix design of SCC. It can be stated that SCC rheology can be optimized if the fine mortar part of concrete is designed properly. However, measurement of the rheological properties is often impractical due to the need for complex equipment. Therefore, more practical methods of assessing mortar wo...
The Effect of infill walls on the seismic performance of boundary columns in reinforced concrete frames
Fenerci, Aksel; Binici, Barış; Department of Civil Engineering (2013)
Reinforced concrete frames with unreinforced masonry infill walls constitute a significant portion of the building stock throughout the world. Infill walls in these buildings are generally considered as non-structural elements and neglected during design and assessment. On the other hand, observations after several earthquakes revealed that infill walls may have detrimental effects on the adjacent frame members. This observation brings out the requirement for further research on the effects of infill walls ...
A detailed analysis for evaluation of the degradation characteristics of simple structural systems
Kurtman, Burak; Erberik, Murat Altuğ; Department of Civil Engineering (2007)
Deterioration in the mechanical properties of concrete, masonry and steel structures are usually observed under repeated cyclic loading in the inelastic response range. Therefore such a behavior becomes critical when these types of structures are subjected to ground motions with specific characteristics. The objective of this study is to address the influence of degrading behavior on simple systems. The Structural Performance Database on the PEER web site, which contains the results of cyclic, lateral-load ...
A laboratory study of anisotropy in engineering properties of Ankara clay
İspir, Mustafa Erdem; Ergun, Mehmet Ufuk; Department of Civil Engineering (2011)
Anisotropy in engineering properties of soils occurs due to the depositional process forming the soil fabric and/or different directional stresses in soil history. This study investigates the anisotropy in undrained shear strength and drained compressibility of preconsolidated, stiff and fissured Ankara Clay. The compressibility behavior is determined using standard oedometer testing while the shear strength anisotropy is investigated through large diameter unconsolidated-undrained triaxial testing on undis...
Citation Formats
M. Sahmaran, H. Christianto, and İ. Ö. Yaman, “The effect of chemical admixtures and mineral additives on the properties of self-compacting mortars,” CEMENT & CONCRETE COMPOSITES, pp. 432–440, 2006, Accessed: 00, 2020. [Online]. Available: