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Research Article: Tawashi & AlAmoudi 64

The Fresh Properties of Self-Compacting mixture, in different cement quantities [13] . The
Concrete proportions of materials for the mixes are given
Three mixtures of self-compacting concrete SCC in table 1.
were produced, in addition to the reference

Table 1. The proportions of materials
Cement quantity Superplasticizer Coarse Aggregates Fine Aggregates
Mixture W/C
( kg/m 3 ) (%) ( kg/m 3 ) ( kg/m 3 )
550 2.0
SCC 500 0.390 2.5 625 1000
450 2.5
The tests of the fresh properties of SCC were Index (VSI), and Segregation Test (SR). As shown
conducted [12] . They include J-ring Test, Slump in Figure 3.
Flow (SF) and T_50 (sec) Test, Visual Stability

Fig. 3. SCC-HRW Fresh Properties Tests
cement quantity (550 kg/m3) containing
The rules for adopting the ratio of plasticizer coded as HRW gives the preferred
superplasticizer depend on the technical properties the operability, Table /2/. The
specification and guidelines for using this type mixture with (450 kg/m3) cement quantity does
of material, where the recommended ratio not give any of the required properties for this
range (from 0.5 to 2.5) % of cement weight. In type of concrete.
the lab tests, the initial ratio was 1% and then
increased till it achieved the required
operability in each one of the mixes. It was
found that the mixture with a proportion of

SJSI – 2023: VOLUME 1-1