4.2 Mix proportion

The experimental work includes various concrete mixes consisting of lightweight EGA, and these concrete mixes were created with partial or total replacement of NWA with LWA. The ACI 211.2-98 guide for LWC was followed for mix designing [20]. In this study, the control of the cement content is intended to properly understand the compressive strength for different concrete mixes without being influenced by the cementitious material effects. Many combinations of aggregates were tested and the optimum aggregate sizes to increase the compressive strength were selected. The mix proportions of the LWAC mixes are found in Table 7. The cement type used was Ordinary Portland cement CEM I 42.5 N. In the presented tables, Poraver size 0.25–0.5 is referred to as LWA (fine), while the LWA sizes, 1–2 and 2–4 mm, are considered as LWA (coarse).

Compressive Strength of Lightweight Concrete DOI: http://dx.doi.org/10.5772/intechopen.88057


Table 7. Mix proportions.

4.1.2 LWA

Figure 2.

Figure 1.

Compressive Strength of Concrete

NWA, from left to right, normal weight gravel mix, and coarse sand.

LWA, from left to right, Poraver 0.25–0.5, 1–2, and 2–4 mm.

LWA [19].

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4.2 Mix proportion

The LWA used in this study is Poraver, [19] which is an expanded glass granule. The material is pressure resistant, durable and dimensionally stable, 100% mineral, spherical in shape, ecological, and not hazardous to health. According to the Poraver technical data sheet, the aggregate is lightweight according to ASTM C330, C331, and C332 and DIN EN 13055-1. Mineral casting and polymer concrete, plaster and dry mortar, lightweight panels, automotive, 3D printing, and other additional practices are practical applications of this material. The aggregate sizes and properties of the LWA are presented in Table 6. The Poraver technical data sheet provided the absorption capacity and moisture content on delivery and specific gravity for the

The experimental work includes various concrete mixes consisting of lightweight EGA, and these concrete mixes were created with partial or total replacement of NWA with LWA. The ACI 211.2-98 guide for LWC was followed for mix designing [20]. In this study, the control of the cement content is intended to properly understand the compressive strength for different concrete mixes without being influenced by the cementitious material effects. Many combinations of aggregates were tested and the optimum aggregate sizes to increase the compressive strength were selected. The mix proportions of the LWAC mixes are found in Table 7. The cement type used was Ordinary Portland cement CEM I 42.5 N. In the presented tables, Poraver size 0.25–0.5 is referred to as LWA (fine), while the LWA

sizes, 1–2 and 2–4 mm, are considered as LWA (coarse).

Figure 3. Ultrasonic pulse velocity instrument.
