Improvement on the properties of gypsum particleboard by adding cement

Gypsum particleboard (GPB) has high thickness swelling (TS), high water abs orption (WA), and low mechanical properties compared with cement-bonded par licle-board. The properties of GPB were improved by adding cement. The expe rimental results showed that GPB with the added cement had good physical an d mechanical properties compared with those of gypsum particleboard with no added cement. The TS and WA of gypsum particleboard with added cement were reduced by 10%. The mechanical properties of GPB, such as internal bond st rength (IB), modulus of rupture (MOR), and modulus of elasticity (MOE), inc reased when the GPB was made with added cement. The properties of GPB impro ved relative to the quantity of cement added. With an increase of cement co ntent from 5% to 10%, the TS and WA were reduced, and the IB, MOR, and MOE were increased. In contrast, the TS and WA increased and the IB, MOE, and M OR decreased when the cement content was increased from 15% to 30%. Thus th e physical and mechanical properties of GPB were successfully improved when the added cement content was 10%.