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Cracking severity versus the measured average crack area, according to the new model and based on the data reported by (Ghourchian et al., 2018) from (Sayahi et al., 2019) Maritz (2012) investigated the plastic shrinkage cracking of VC by focusing on evaporation and bleeding. He also used a mold manufactured according to (ASTM C 1579, 2013). The quantified crack areas are plotted in Fig. 8 versus the calculated C s . The difference in the values of the measured crack areas, in Fig. 6 to Fig. 8, is caused by the variation of the restrain degree, since different molds were used in the above mentioned studies. Thus, it should be remarked that the new model is only applicable on a group of equally retrained specimens.
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... the cracking tendency. (2018) studied the influence of different Portland and blended cements on the cracking of plastic vibrated concrete (VC), during which they used an (ASTM C 1579-13, 2013) mold. By applying the model on the reported data by (Ghourchian et al., 2018), a linear correlation between the crack area and C s was detected, see Fig. 7. Thus, it was concluded that the model is applicable for both SCC and VC. Maritz (2012) investigated the plastic shrinkage cracking of VC by focusing on evaporation and bleeding. He also used a mold manufactured according to (ASTM C 1579(ASTM C , 2013). The quantified crack areas are plotted in Fig. 8 versus the calculated C s ...
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... by comparing the value of C s in SCC (Fig. 6) to that of VC ( Fig. 7 and Fig. 8), it can be seen that C s depends also on the concrete type. SCC has relatively lower bleeding capacity compared to VC, based on which the observed dependency of C s may be explained. Accordingly, the new model gives higher values of C s for SCC in comparison to VC, which confirms that mixtures of high cement content are ...
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... the cracking tendency. (2018) studied the influence of different Portland and blended cements on the cracking of plastic vibrated concrete (VC), during which they used an (ASTM C 1579-13, 2013) mold. By applying the model on the reported data by (Ghourchian et al., 2018), a linear correlation between the crack area and C s was detected, see Fig. 7. Thus, it was concluded that the model is applicable for both SCC and VC. Maritz (2012) investigated the plastic shrinkage cracking of VC by focusing on evaporation and bleeding. He also used a mold manufactured according to (ASTM C 1579(ASTM C , 2013). The quantified crack areas are plotted in Fig. 8 versus the calculated C s ...
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... by comparing the value of C s in SCC (Fig. 6) to that of VC ( Fig. 7 and Fig. 8), it can be seen that C s depends also on the concrete type. SCC has relatively lower bleeding capacity compared to VC, based on which the observed dependency of C s may be explained. Accordingly, the new model gives higher values of C s for SCC in comparison to VC, which confirms that mixtures of high cement content are ...
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... Internal maintenance includes unique ingredients that provide the concrete mix with the required moisture balance [32]. These additions might either be regular aggregates wetly added to the concrete mix or other ingredients (e.g., special fillers or absorbent additives) [33]. ...
Fibrous high-strength concrete by means of natural and technogenic raw materials is in demand for sustainable construction. The scientific novelty of this study lies in the expansion of the range of applied natural raw materials locally available for polymineral binders, instead of using manufactured or rare materials. This research aimed to improve the performance and properties of high-strength concrete with an improved composite binder and polypropylene fiber. The task was achieved by using a powdered mineral modifier, the introduction of which will make it possible to effectively control the processes of synthesis of hydration products during the hardening of the cement composite. The study of the characteristics of the feedstock included: energy density, particle size distribution, and specific surface area. A comprehensive study of the obtained materials properties included: X-ray diffraction analysis, scanning electron microscopy, standard consistency, setting time, compressive and flexural strength, elastic modulus, structural quality factor, water retention capacity, adhesion strength, water resistance, abrasion resistance, thermal conductivity. It is proposed to use an energy measure that allows ranking raw materials to produce building materials. Optimization of the micro and macro level structural component using local raw materials, makes it possible to attain a compressive strength of materials by about 80 MPa, a flexural capacity and an elastic modulus of 15.2 MPa and 78.4 GPa respectively. The developed mortar and polypropylene fiber-reinforced concrete is a reliable and durable material that retains its specified performance characteristics over time without destruction under operating conditions. Water holding capacity observed was 89.5% which is 1.54 times higher than that of unmodified composition, adhesion strength to the base 0.90 (80% higher). Additionally the observed structural quality factor was 0.36 (4 times higher), water resistance under pressure 0.8 MPa (0.2 MPa for unmodified composition), abrasion was 0.70 g/cm 2 (59% lower), thermal Case Studies in Construction Materials 17 (2022) e01621 2 conductivity coefficient was 1.29 W/(m⋅ºС) (56% lower). Comprehensive results evidenced of using high-strength materials for a wide range of structures, including load-bearing, enclosing, road, hydraulic.