Method for determining the reactivity index of cement kiln dust, related compositions and methods of use
A cement kiln dust, reaction index technology, applied in drilling compositions, cement production, chemical instruments and methods, etc., can solve problems such as lack of predictability and consistency, unsuitable well treatment, etc.
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Embodiment 1
[0063] The response index for the compressive strength of thirty three different cement kiln dust samples (designated samples A to GG) was determined and provided in figure 1 middle. The CKD samples were each from a different supply source. The response indices of the thirty three CKD samples were determined by dividing the measured 24 hour compressive strength of the settable composition by the specific surface area of the CKD sample. The specific surface area of each CKD sample was determined by dividing the total surface area of a particular CKD sample by the sample mass. Surface area was determined using a Malvern particle size analyzer. The 24 hour compressive strength of each CKD sample was determined by first preparing a settable composition comprising the CKD sample in an amount of 100% bwoc and water in an amount sufficient to provide a density of about 13 lb / gal. After preparation, the settable composition was allowed to cure for 24 hours in a 2"x4" metal cy...
Embodiment 2
[0065] Blended cementitious components were prepared comprising a mixture of CKD samples from Example 1 as indicated in the table below. The determined response indices for the CKD samples were then used in the following equations to predict the performance of each blended cementitious component.
[0066] CS 掺合 =(RI Z ) (SSA Z )(f Z ) m + (RI F ) (SSA F )(f F ) m +(RI E ) (SSA E )(f E ) m
[0067] where CS 掺合 is the estimated compressive strength of the blended cementitious component, RI Z is the response index of the compressive strength of CKD sample Z and is 6.9, m is 1, SSA Z is the specific surface area of CKD sample Z and is 2.32, f Z is the mass fraction of CKD sample Z, RI F is the response index of the compressive strength of CKD sample F and is 105, SSA F is the specific surface area of CKD sample F and is 2.33, f F is the mass fraction of CKD sample F, RI E is the response index of the compressive strength of CKD sample E and is 107, SSA E ...
Embodiment 3
[0073] Determination of CKD samples Z, F and E from Example 1 at 511sec -1 and 51sec -1 The Response Index for the Volume Average Apparent Viscosity below and is provided in Table 2 below. The reactivity index for these samples was determined by dividing the measured volume average apparent viscosity of the settable composition by the specific surface area of the CKD samples. The specific surface area of each CKD sample was determined by dividing the total surface area of a particular CKD sample by the sample mass. Surface area was determined using a Malvern particle size analyzer. The 24 hour volume average apparent viscosity ("VAV") of each CKD sample was determined by first preparing a condensable combination comprising the CKD sample in an amount of 100% bwoc and water in an amount sufficient to provide a density of about 12 lb / gal thing. Measured 511sec according to API RP 10B-2 -1 and 51sec -1 The volume-average apparent viscosity below.
[0074] Table 2
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