Tender For Cement Additives 10 85045205 Low To Moderate Temperature Cement Retarder, With The Following Specifications : 1. Physical State : The Material, As Received, Shall Be Free Flowing Powder, Free From Dirt & Foreign Matter. 2. Moisture Conte

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Tender for cement additives 10 85045205 low to moderate temperature cement retarder, with the following specifications : 1. physical state : the material, as received, shall be free flowing powder, free from dirt & foreign matter. 2. moisture content, percent by mass : 10.0 (maximum) 3. solubility in water : 2 gms of material should be completely soluble in 100 ml. distilled water at 24 + 2 °c. 4. performance test : (a) effect on thickening time : the thickening time of the cement slurry having composition 100 gm. api class `g (hsr type) cement + 44 gm. of fresh water + 0.3 gm. low to moderate temperature retarder sample, when determined at 6000 psi pressure and 90 °c temperature (raised in 30 minutes) shall not be less than 130 minutes. (b) effect on consistency : the consistency of the cement slurry having composition as in 4(a) shall remain below 20 bc for 75% of the thickening time. (c) effect on water separation : the free water separation of the cement slurry having the composition 100 gm. class `g hsr cement + 44 gms. of fresh waer (total solids not exceeding 1000 ppm) + 1.0 gm. of low to moderate temperature retarder sample, determined at 24 degc and atmospheric pressure as per api procedure (ref. apirp 10, 1990) shall not be more than 10 percent by volume of the total slurry volume 5. packing : (i) packing should be in multi walled paper bags along with at least two (2) moisture proof layers and extra polythene liner. it should prevent from damages during multiple handling as well as rigours of transit and storage. capacity of the bags: 50 lbs (22.7 kg) or 55 lbs (25 kg). (ii) pelletization:-if supply is from foreign source, the supply should be in suitably pelletized forms. 6. marking : each bag should have clear legible marking as follows :- i) name of the product ii) name of supplier/manufacturer iii) date/month/year of manufactur iv) supply order no. against which supply is made. note : manufacturers test certificates should be furnished alongwith the despatch/shipping documents.