description the cement slurries of the invention are essentially constituted by cement water and between 30 and 100 by weight of cement of rubber particles obtained for example by grinding recycled automobile tires with grain sizes in the 40 60 mesh 250 425 u03bcm range the rubber particles used originate from recycled tires from the automobile industry they are obtained by grinding or low temperature disintegration of tires particles with a diameter in the range 250 u03bcm to 400 u03bcm are particularly preferred such grain sizes produce pumpable slurries with suitable rheology the formulations of the invention are preferably based on class a b c g and h portland cements as defined in section 10 of the american petroleum institute api standards class g portland cements are particularly preferred but other cements which are known in the art can also be put to profitable use for low temperature applications aluminous cements are particularly suitable also portland plaster mixtures for low temperature wells deep water wells for example or cement silica mixtures for wells where the temperature exceeds 120 u00b0 c for example the water used to constitute the slurries is preferably low mineral water such as tap water other water such as sea water can optionally.