Advantages of mortar-based design for coloured self-compacting concrete

López, Ana Clara; Tobes, Juan Manuel; Giaccio, Graciela Marta; Zerbino, Raúl Luis

doi:10.1016/j.cemconcomp.2009.07.005

Cited by 44 publications

(21 citation statements)

References 5 publications

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“…Angles of 0°, 90°, 180° and 270° correspond to red, yellow, green and blue, respectively. C* and h* can be calculated by the equations as (López et al, 2009;Wang and Liu, 2012):…”

Section: Properties Of Hardened Mortarsmentioning

confidence: 99%

Recycling red mud from the production of aluminium as a red cement-based mortar

Yang

Zhao

et al. 2017

Waste Manag Res

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Current management for red mud is insufficient and a new method is needed. A series of experiments have been carried out to develop a new approach for effective management of red mud. Mortars without or with 3%, 6% and 9% red mud were prepared and their fresh and hardened properties were measured to access the possibility of recycling the red mud in the production of red cement-based mortar. The mechanisms corresponding to their mechanical performance variations were explored by X-ray powder diffraction and scanning electron microscopy. The results show that the fresh mortars with red mud present an increase of viscosity as compared with the control. However, little difference is found when the content of red mud is altered. It also can be seen that red mud increases flow time and reduces the slump flow of the mortar. Meanwhile, it is found that mortar with red mud is provided with higher air content. Red mud is eligible to adjust the decorative mortar colour. Compressive strength of mortar is improved when less than 6% red mud is added. However, overall it has a slightly negative effect on tensile bond strength. It decreases the Ca(OH) content and densifies the microstructure of hardened paste. The heavy metal concentrations in leachates of mortars with red mud are much lower than the values required in the standard, and it will not do harm to people's health and the environment. These results are important to recycle and effectively manage red mud via the production of red cement-based mortar.

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“…Angles of 0°, 90°, 180° and 270° correspond to red, yellow, green and blue, respectively. C* and h* can be calculated by the equations as (López et al, 2009;Wang and Liu, 2012):…”

Section: Properties Of Hardened Mortarsmentioning

confidence: 99%

Recycling red mud from the production of aluminium as a red cement-based mortar

Yang

Zhao

et al. 2017

Waste Manag Res

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“…Recently, colored SCC (C-SCC) for architectural concrete has been developed [20][21][22]. López et al (2009) [20] conducted an experimental investigation on C-SCC and presented advantages of using a mortar-based mix design method for C-SCC. Determination of the optimum proportions of SCC mixtures (consisting of various types of pigments, cements, and mineral/chemical admixtures) were quick and easy by using the mortar-based approach.…”

Section: Introductionmentioning

confidence: 99%

Towards Innovative and Sustainable Construction of Architectural Structures by Employing Self-Consolidating Concrete Reinforced with Polypropylene Fibers

Zatar¹,

Nguyen²

2021

Design of Cities and Buildings - Sustainability and Resilience in the Built Environment

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Self-consolidating concrete (SCC) has been successfully employed to reduce construction time and enhance the quality, performance, and esthetic appearance of concrete structures. This research aimed at developing environmentally friendly fiber-reinforced concrete (FRC) consisting of SCC and recycled polypropylene (PP) fibers for sustainable construction of city buildings and transportation infrastructure. The addition of the PP fibers to SCC helps reducing shrinkage cracks and providing enhanced mechanical properties, durability, and ductility of the concrete materials. Several mix designs of self-consolidating fiber-reinforced concrete (SCFRC) were experimentally examined. Material and esthetic properties of the SCFRC mixtures that include micro silica, fly ash, and PP fibers were evaluated. Trial-and-adjustment method was employed to obtain practically optimum SCFRC mixtures, mixtures that are affordable and easy to make possessing enhanced compressive strength and esthetic properties. Slump flow and air content testing methods were used to determine the fresh properties of the SCFRC mixtures, and the esthetic properties of the mixtures were also evaluated. The hardened properties of the SCFRC mixtures were examined using three- and seven-day compression tests. The amount of fine/coarse aggregate, water, and other admixtures were varied while the Portland cement content in all mixtures was maintained unchanged. The maximum three-day compressive strength was 43.17 MPa and the largest slump flow was 736.6 mm. Test results showed enhanced material properties such as slump flow, air content and compressive strength values of the SCFRC mixtures and their excellent esthetic appearance. The favorable seven-day compressive strength of the SCFRC mixture, with 4.8 percent air content and 660.4 mm slump flow, is 39.26 MPa. The mixtures’ in this study are proven to be advantageous for potential SCFRC applications in architectural structures including building façades and esthetically-pleasing bridges.

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“…It assumes the concrete as a material consisting of two phases: the mortar and the coarse aggregate. This method was verified in self-compacting concrete with fibers and high strength [17] and colored self-compacting concrete [18].…”

Section: Introductionmentioning

confidence: 99%