Utilisation Of Clamshells As Aggregate Substitute In Paving Blocks

Paving blocks are becoming more popular among consumers because they are environmentally friendly, cansavegroundwater,areeasytoinstallandmaintain,andhavemanyshapesthataddaestheticvalue. This studyaims todeterminethe differenceof shells on the waterabsorptioncapacityof paving blocks andthe strength of paving blocks. Experiments were conducted at the structure and materials laboratory of MuhammadiyahUniversityofPareparefromAugusttoOctober2023forthisresearchmethod.The results showedthatthewaterabsorption of paving blockswasinfluencedby the additionofseashells. The water absorptionvaluesofthe0%,5%,10%,and25%variationswere1.4percent,2percent,3.4percent,and3.7 percentforthe7-daytreatmentperiod;0.6percent,1.7percent,2.4percent,and3.3percentforthe14-day treatment period; and 1.3%, 2.8 percent, 3.0 percent, and 4.6 percent for the 28-day treatment period. According to the above results, the more clamshells added, the greater the water absorption. The compressive strength shows that the addition of clamshells affects the compressive strength of block paving. The compressive strength values were 23.841 Mpa, 9.365 Mpa, 21.587 Mpa, and11.429Mpa atthe 28-daycuring age, respectively. Themoreclamshells added, the lowerthecompressive strength.