Experimental Data of Post-installed Screw Pullout (PSP) test for assessing compressive strength of cementitious materials

A recently developed in-situ test method, the Post-installed Screw Pull-out (PSP) test showed potential to be used in the field of assessing compressive strength of cementitious materials. The test is based on the controlled pull-out of a standard concrete screw where the failure pattern is dominated by a complete pull-out failure. During the pullout operation, the load is transferred through the screw thread to the surrounding materials, such as concrete and/or mortar.
Screw anchors can experience different failure modes, including steel failure, concrete cone failure, complete pull-out failure, or a combined cone and pull-out failure. Existing literature and design manuals consider cone failure as critical. The data related to the complete pull-out failure of the concrete screw is limitedly available. The datasets presented here were generated based on a systematic experimental design.
The datasets presented here contain the results of the PSP test in different types of concrete/mortar samples. The PSP test was carried out as per the configuration and methodology developed by Al-Sabah et al (2021) 'The post-installed screw pull-out test : Development of a method for assessing in-situ concrete compressive strength' (https://doi.org/10.1016/j.jobe.2020.101658).
The data is presented in Microsoft Excel (2023) where the load and displacement values of the screw produced during the PSP tests are provided. The tab designation that are used within an excel file are as follows:
(M or LS or BR or LW-X)-Y-Z
where,
M – Mortar samples
LS – Concrete with limestone as coarse aggregate
BR - Concrete with brick chips as coarse aggregate
LW - Concrete with lightweight pumice as coarse aggregate
X – Mix design designation
Y – Sample tested at Y days
Z – Sample number.
Column C (LVDT 1) in the Excel file shows the displacement of the screw head and Column D (LVDT 2) provides the displacement of the sample surface. The difference between the displacement of the screw head and the sample surface was calculated in Column E (Displacement) in order to accurately determine the actual displacement of the screw relative to the concrete sample.
Each Excel file also contains a ‘Figure’ tab which shows the generated curves based on the load and displacement values from each sample from the other tabs in the file.