lightening admixture

基本解釋

減輕劑
This item is base on analyzing the physicochemical properties of low density cement slurry system and the lightening admixture which is one of the composing of the low density cement slurry system such as bentonite,fly ash,silica powder,slag,hollow microsphere, and so on. Firstly, we design particle compound by grade of the cement slurry system by using of the theory of closed stack; analyzed and evaluate the capability and characteristic of this cement slurry system such as compressive strength, thickening-time, fluid permeability, subsidence stability and so on; Then we choose the optimum combination of the external material, the necessary filtrate reducer and early strength agent through theoretical calculate and laboratory test, and define the basic formula of the different density′s low density cement slurry we carried on surface simulation test and field test in 2 wells.
本文在分析膨潤土、粉煤灰、矽灰、鑛渣、漂珠等一系列減輕劑及其相應的低密度水泥漿躰系中物理化學作用基礎上,利用顆粒緊密堆積理論對躰系的固相顆粒級配組成進行了設計,分析和評價了所設計躰系的抗壓強度、稠化時間、滲透率、水泥漿沉降穩(wěn)定性等性能特點,優(yōu)選了躰系的外摻料、配套降失水劑與早強劑等外加劑的加量,確定了不同密度低密度水泥漿的基礎配方。