By Masaki Kitazume
The pneumatic stream blending process was once constructed to stabilize dredged soil and surplus soil for selling their valuable use in 1999. The pneumatic movement blending approach is a brand new kind of the ex-situ cement stabilization options, within which dredged soil and surplus soil is blended with a comparatively small volume of chemical binder with none blending paddles and blades in a pipeline. whilst a comparatively great amount of compressed air is injected into the pipeline, soil should be separated into small blocks. while binder is injected into the pipeline, the soil block and binder are completely combined via turbulent stream generated within the soil block in the course of transporting. As this technique has many advantages - speedy and massive scale execution might be performed with comparatively cheap - it's been utilized to many land reclamation tasks, backfilling at the back of earth maintaining wall initiatives and shallow stabilization initiatives utilizing dredged soils and surplus soils.
The publication offers the cutting-edge within the pneumatic circulation blending strategy, and covers contemporary applied sciences, study actions and information in equipment, layout, development know-how and qc and assurance.
The Pneumatic stream blending Method is an invaluable reference device for engineers and researchers inquisitive about admixture stabilization expertise far and wide, despite neighborhood soil stipulations and a range in applications.
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Extra resources for The pneumatic flow mixing method
0) decreases with the water content ratio and the flow value, which indicates the required air pressure at the inlet may decrease. 2 (Ministry of Transport, The Fifth District Port Construction Bureau, 1999). 36 m3 is transported every about 6 seconds at an average speed of about 12 m/s. As the soil plug is transported at very high speed in the pipeline, a turbulent flow is generated within the soil plug due to the friction on the inner surface of the pipeline. The turbulent flow functions to mix the soil and binder thoroughly.
Mixing conditions IV. Curing conditions 1. Type of binder 2. Quality of binder 3. Mixing water and additives 1. Physical, chemical and mineralogical properties of soil 2. Organic content 3. Potential Hydrogen (pH) of pore water 4. Water content 1. Quantity of binder 2. Degree of mixing 3. Timing of mixing/re-mixing 4. Placement condition 1. Temperature 2. Curing period 3. Humidity 4. Wetting and drying/freezing and thawing, etc. 5. Overburden pressure 6. Soil disturbance/compaction standardized by the Japanese Geotechnical Society (formerly Japanese Society of Soil Mechanics and Foundation Engineering).
5 Chemical components of binders (Coastal Development Institute of Technology, 2008a). , 1978). , 2003). , 2003). 0%). The stabilized soils were subjected Factors affecting strength increase 33 to the needle penetration tests (JIS A 6204) within one day’s curing and an unconfined compression test after one day’s curing. 0% are a little smaller than the BB-stabilized soil. 5(b). 1 Soil type In order to investigate the influential factors on cement stabilization, Babasaki et al. (1996a, 1996b) collected 231 test results on soils taken from 69 locations in Japan from the 14 papers published during 1981 to 1992 in Japan.
The pneumatic flow mixing method by Masaki Kitazume