Mixture Optimization of Concrete Paving Blocks Containing Waste Silt

Abstract

Most of the waste materials recycled for the production of new construction materials are by-products of various manufacturing processes, such as the aggregate washing process. Recycling such materials is of paramount importance since it could reduce the adverse environmental impacts resulting from landfilling. Various studies have attempted to recycle different types of waste materials and by-products into concrete paving blocks. However, the availability of literature on concrete paving blocks containing waste silt is quite scarce. Thus, the current paper focuses on mix design optimization and production of concrete paving blocks containing high amounts of waste silt resulting from the aggregate production process. Using the mixture Design of Experiments (DOE), 12 sets of concrete paving blocks with different aggregate blends were produced to optimize the mix design. Once the final mix design was achieved, the physical and mechanical properties of the concrete paving blocks were investigated following the EN 1338 standard. Shape and dimension measurements and various tests, including water absorption, tensile splitting strength, abrasion resistance, and slip/skid resistance were conducted on the experimental concrete paving samples. Overall, the produced concrete paving blocks showed promising properties for future applications in pedestrian walking paths.

Global warming potential-based life cycle assessment and optimization of the compressive strength of fly ash-silica fume concrete; environmental impact consideration

“…By decreasing the requirement for cement, using supplemental cement ingredients like SF and FA has a favorable impact on energy, economical, and environmental considerations in the concrete industry (Dong et al, 2015;Hossain et al, 2016;Liu et al, 2017;de Matos et al, 2020;Kumar et al, 2021a;Alaloul et al, 2021;Çelik et al, 2022). Optimizing concrete mixes using supplementary content is another important consideration in literature (AlShareedah and Nassiri, 2021;Bhuva and Bhogayata, 2022;Wang et al, 2022b;Chen et al, 2022;Rezazadeh Eidgahee et al, 2022;Siamardi, 2022;Solouki et al, 2022;Sun et al, 2022;Warda et al, 2022). As an example, the mechanical characteristics of FA-SF plain concrete (FA-SPC) and FA SF coconut fiber reinforced concrete (FA-SCFRC) are examined in Khan and Ali's study (Khan and Ali, 2019).…”

Laboratory Innovation to Investigate Concrete Paving Blocks Compressive Strength

“…Figure 9 compares the performance of mixtures with controlled variations in clay content in the filler. The results reveal that the compressive strength value increases when controlling clay with a filler component of less than 5% [16]. On the other hand, if the clay content exceeds the maximum allowable limit, it will harm compressive strength.…”

“…The development of CPB production innovation must include quality improvements, especially in compressive strength performance. Production methods continue to develop from simple manual methods to automatic machines; therefore, material inspection is required to ensure optimal strength [16,17]. Similar to concrete mixtures in general, the compressive strength of CPB is influenced by water, clay, and aggregate content.…”

Waste Silt as Filler in Hot Mix Asphalt: A Laboratory Characterization

“…The aggregates, including sand (0-4 mm) and gravel (4-8 mm), were provided by S.A.P.A.B.A. [23]. A neat 50/70 penetration grade bitumen (PEN 50/70) was used in the present study.…”