Disposal of sewage sludge is becoming a serious environmental problem. Thernincineration process is able to reduce the volume of sewage sludge. It is not a properrnsolution, so the sewage sludge ash generated after the incineration process, and itrnmust be disposed to landfill. The general objective of this study was to investigate thernproperties and use of sewage sludge ash as supplementary cementation material forrnconcrete. Sewage sludge was incinerated at temperature of 600 ÂºC and 800 ÂºC for 3 &rn2.5 hours. The incinerated sewage sludge ash was sieved through size of 75 Âµm andrninvestigates physical properties, and chemical compositions of sewage sludge ashrnwere carried out. SSA is pozzolanic material satisfied the requirement of ASTMrnC618. Chemical composition of SSA incinerated at 600 ÂºC and 800 ÂºC wererndetermined by Atomic Absorption spectrometer. AAS test has shown that the sewagernsludge ash contained primarily these oxides such as SiO2, Al2O3, Fe2O3 and CaO. Thernconcrete specimens were prepared using 5 %, 10 %, 15 %, and 20 % of the tworntemperatures incinerated sewage sludge ash that is 600 ÂºC and 800 ÂºC, and design mixrnratio of 1:2:4 with w/c ratio was 0.82. The cubic mold size of 10 cm x 10 cm x 10 cmrnwas used to produce a concrete specimen, and the concrete tests have then beenrnmeasured both at the fresh and hardened concrete. In the hardened concrete, thernresults of a concrete have shown that 600 ÂºC SSA 5% & 800 ÂºC SSA 10% rnreplacement of OPC by sewage sludge ash achieved a higher compressive strengthrnthan the others percentage of set in this research at the age of the 28 days asrncompared with the control concrete (0 % SSA). The percentage of water absorptionrnincreased with increase in sewage sludge ash that incinerated at temperature of 600 ÂºCrn& 800 ÂºC, and all the blended (% SSA) concretes have shown a higher amount ofrnwater absorbed as compared with the control concrete (0 % SSA).