Grout for filling a micro-trench

Abstract

A grout for filing a micro-trench formed in the ground includes comprises Class F fly ash in a range of approximately 0 to 30% by weight of grout and cement kiln dust in a range of approximately 50 to 90% by weight of grout.

What is claimed is: 
     
         1 . A grout for a backfilling a micro-trench, comprising:
 class F fly ash in a range of approximately 0 to 30% by weight of the grout; and   cement kiln dust in a range of approximately 50 to 90% by weight of the grout.   
     
     
         2 . The grout of  claim 1 , wherein it is formed as a single grout composition for mixing with water to yield a finished grout. 
     
     
         3 . The grout of  claim 1 , wherein the grout mixture is inserted into the micro-trench and consolidates into voids in pavement and aggregate sub base areas giving structural stability to any defects in said pavement and aggregate sub base areas. 
     
     
         4 . The grout of  claim 1 , further comprising:
 a mid-range water reducer.   
     
     
         5 . The grout of  claim 4 , wherein said mid-range water reducer is naphthalene. 
     
     
         6 . The grout of  claim 4 , wherein said mid-range water reducer is a lignosulphonate. 
     
     
         7 . The grout of  claim 4 , wherein said mid-range water reducer is added at a rate of approximately 0-12 fluid ounce equivalent per hundred-weight of dry grout mixture. 
     
     
         8 . The grout of  claim 4 , further comprising:
 a dry sodium hydroxide material.   
     
     
         9 . The grout of  claim 8 , wherein said dry sodium hydroxide material is added at a rate of approximately 0-19 dry ounces per hundred weight of dry grout mixture. 
     
     
         10 . A method of preparing a micro-trench backfill grout from recycled materials, comprising:
 preparing a single component dry grout mixture comprising approximately 0-30% class F fly ash and approximately 50-90% cement kiln dust;   adding approximately five gallons of water to approximately 70 pounds of said dry grout mixture;   adding a mid range water reducer at an addition rate of approximately 0-12 fluid ounce equivalent per hundred-weight of said dry grout mixture; and   adding dry sodium hydroxide at an addition rate of between approximately 0-19 dry ounces per hundred weight of said dry grout mixture.