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

The NWA's absorption capacity, specific gravity, and moisture content are evaluated according to ASTM C 127-01 [17] and ASTM C 566 [18]. Table 6 includes aggregate properties such as specific gravity, absorption capacity, moisture content, and fineness modulus (FM). In Figures 1 and 2, the individual aggregates are shown. The maximum normal weight aggregate size was 9.53 mm (3/8″).


#### Table 4.

kilometers per second. The expressions are presented below for different coarse

10 fc ¼ 0:854 exp 1ð Þ :28882 � UPV Trtniket et al., 2009

No. Proposed equations Author, year fc <sup>¼</sup> <sup>1</sup>:<sup>2</sup> � <sup>10</sup>�<sup>5</sup> � UPV<sup>1</sup>:<sup>7447</sup> Kheder, 1999 fc ¼ 36:75 � UPV–129:077 Qasrawri, 2000 fc ¼ 21:5 � UPV 62 AIJ, 1983 fc <sup>¼</sup> <sup>0</sup>:<sup>6401</sup> � UPV<sup>2</sup>:<sup>5654</sup> Ali-benyahia, 2017 fc <sup>¼</sup> <sup>0</sup>:0316 exp 1:<sup>3</sup> <sup>∗</sup> ð Þ UPV Atici, 2011 fc <sup>¼</sup> <sup>0</sup>:<sup>5208</sup> � UVP<sup>5</sup> Khan, 2012 fc ¼ 50:163 � UPV–178:2 Kim, 2012 fc ¼ 0:0136 � UPV–21:34 Najim, 2017

Table 3 showcases some of the different equations generated by researchers in the last decades to predict compressive strength of concrete, fc, in terms of

In this section an experimental program was developed and conducted by the author and his graduate student to investigate the compressive strength of LWAC containing a specific type of expanded glass aggregate (EGA), to better showcase

Tables 4 and 5 consist of the sieve analyses for the normal weight gravel and coarse sand, respectively, which were measured according to ASTM C136-01 [16].

f <sup>c</sup> ¼ 8:88 exp :ð Þ 0:42v (4)

–316:<sup>76</sup> � UPV <sup>þ</sup> <sup>681</sup>:<sup>62</sup> Rashid, 2017

f <sup>c</sup> ¼ 0:06 exp :ð Þ 1:6v (5)

f <sup>c</sup> ¼ 1:03 exp :ð Þ 0:87v (6)

f <sup>c</sup> ¼ 1:39 exp :ð Þ 0:78v (7)

For CA (coarse aggregate content) = 1000 kg/m<sup>3</sup>

Proposed equations for finding the compressive strength of concrete using UPV [15].

aggregate (CA) contents:

Compressive Strength of Concrete

Table 3.

<sup>9</sup> fc <sup>¼</sup> <sup>38</sup>:<sup>05</sup> � UPV<sup>2</sup>

For CA = 1200 kg/m<sup>3</sup>

For CA = 1300 kg/m<sup>3</sup>

For CA = 1400 kg/m<sup>3</sup>

4. Experimental program

the properties of LWAC [1].

4.1 Lightweight and normal weight aggregates

UPV [15].

4.1.1 NWA

56

Sieve analysis for normal weight gravel mix.


#### Table 5.

Sieve analysis for normal weight coarse sand.


### Table 6.

LWA and NWA properties.

Figure 1. NWA, from left to right, normal weight gravel mix, and coarse sand.

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