by clicking the arrows at the side of the page, or by using the toolbar.
by clicking anywhere on the page.
by dragging the page around when zoomed in.
by clicking anywhere on the page when zoomed in.
web sites or send emails by clicking on hyperlinks.
Email this page to a friend
Search this issue
Index - jump to page or section
Archive - view past issues
Concrete In Australia : March 2013
Concrete in Australia Vol 39 No 1 25 intervals of 10 minutes and the measurements are presented in Figure 6. e rapid change in ambient temperature and humidity which can be observed in Figure 6 (sudden jump in the reading in the figure) was caused by the opening of the laboratory doors in the morning. 5.0 RESULTS AND DISCUSSION e graphs depicting the applied load and resulting uplift of the anchor are presented in Figure 7. For all specimens with reinforcement arrangement REO1, the carrying capacity dropped nearly to zero after reaching the peak load due to the cracking of the concrete as shown in Figure 7a. e higher residual strength measured for sample SJH1 was due to the crack pattern which developed into the reinforcement placed at the bottom of the panel, therefore engaging the reinforcement in resisting the applied load. For samples with reinforcement arrangement REO2, the load dropped suddenly after the peak load was reached as illustrated in Figure 7b. e specimens were then able to resist a load Figure 6. Ambient temperature and humidity of the surrounding environment during the tests. Figure 7. Load-displacement curves recorded during the tests. Table 2. Summary of the concrete material properties. Concrete strengths for samples with REO1 reinforcement arrangement Concrete strengths for samples with REO2 reinforcement arrangement Age of concrete (days) Compressive strength (MPa) Tensile strength (MPa) Compressive strength (MPa) Tensile strength (MPa) 1 (at the beginning of the experiments) 14.8 1.3 11.2 1.1 1 (at the end of the experiments) 17.3 1.5 14.7 1.4 7 27.6 2.0 25.2 1.8 14 30.7 2.1 29.7 2.1 21 31.9 2.2 31.4 2.2 28 32.8 2.3 33.1 2.3 0 5 10 15 20 25 01 02 03 04 0 Samples with REO1 Samples with REO2 hours after pouring temperature ºC 0 20 40 60 80 01 02 03 04 0 %RH Samples with REO1 Samples with REO2 hours after pouring 0 20 40 60 80 0246 1 2 stroke (mm) load(kN) SJH1 SJH2 EPA1 EPA2 CA1 CA2 0 20 40 60 80 0 2 4 6 12 SJH3 SJH4 EPA3 EPA4 CA3 CA4 stroke (mm) load(kN) (a) Ambient temperatures (a) Specimens with REO1 reinforcement. (b) Specimens with REO2 reinforcement. (b) Ambient humidity