MansyurM. (2017) “The Experimental Study Of Wekondo Materialsplite And Sand Of Poni-Poniki District Tirawuta East Kolaka Regency As Material Of Concrete Making”, IJTI International Journal of Transportation and Infrastructure eISSN 2597-4769 pISSN 2597-4734, 1(1), pp. 34-39. doi: 10.29138/ijti.v1i1.470.