بررسی اثر مواد افزودنی سیلیکات سدیم ، کائولینیت، سیمان و آّب بر روی خواص رئولوژیکی و فیزیکی گروتهای پایه سیمان در مهندسی ساختمان

ﺑﺎ ﭘﯿﺸﺮﻓﺖ ﺗﮑﻨﻮﻟﻮژی ﺗﺰرﯾﻖ در ﺻﻨﻌﺖ ﺑﻬﺴﺎزی زﻣﯿﻦ ﻫﺎ، ﮔﺮوت ﻫﺎ و اﻓﺰودﻧﯽ ﻫﺎی ﺧﺎص ﻧﻘﺶ ﻣﻬﻤﯽ را اﯾﻔﺎ ﻣﯽ ﻧﻤﺎﯾﻨﺪ. در اﯾﻦ ﭘﮋوﻫﺶ ﻣﻌﯿﺎرﻫﺎی وﯾﺴﮑﻮزﯾﺘﯽ و رﺋﻮﻟﻮژی ﮔﺮوت ﺑﺎ اﺳﺘﻔﺎده از دﺳﺘﮕﺎه وﯾﺴﮑﻮزﯾﻤﺘﺮ ﻣﺪل (dv ii+pro) و ﻫﻤﭽﻨﯿﻦ ﻣﻌﯿﺎرﻫﺎی ﻓﯿﺰﯾﮑﯽ ﮔﺮوﺗﻬﺎ از ﺟﻤﻠﻪ ﺟﻤﻊ ﺷﺪﮔﯽ (اﻧﻘﺒﺎض)، ﺗﻮده وﯾﮋه، ﻣﻘﺪار اﺳﯿﺪﯾﺘﻪ ﺑﺮ روی ﮔﺮوت ﭘﺎﯾﻪ ﺳﯿﻤﺎن ﺑﻬﻤﺮاه ﺳﯿﻠﯿﮑﺎت ﺳﺪﯾﻢ ﺑﻌﻨﻮان ﻣﺎده اﻓﺰودﻧﯽ ﺷﯿﻤﯿﺎﺋﯽ، ﮐﺎﺋﻮﻟﯿﻨﯿﺖ، ﺳﯿﻤﺎن و آب ﺑﺮرﺳﯽ ﺷﺪه اﺳﺖ. ﻫﻤﭽﻨﯿﻦ، ﺗﺮﮐﯿﺒﺎت ﻣﺨﺘﻠﻒ ﮔﺮوت ﺑﺎ درﺻﺪﻫﺎی ﻣﺨﺘﻠﻔﯽ از ﺳﯿﻠﯿﮑﺎت ﺳﺪﯾﻢ، ﮐﺎﺋﻮﻟﯿﻨﯿﺖ و آب ﺳﺎﺧﺘﻪ ﺷﺪه ﮐﻪ ﻧﺘﺎﯾﺞ ﺑﺪﺳﺖ آﻣﺪه ﻧﺸﺎن ﻣﯽ دﻫﺪ ازدﯾﺎد ﺳﯿﻤﺎن، ﮐﺎﺋﻮﻟﯿﻨﯿﺖ و ﺳﯿﻠﯿﮑﺎت ﺳﺪﯾﻢ ﺑﺮ وﯾﺴﮑﻮزﯾﺘﻪ ﮔﺮوت اﺛﺮ ﻣﻌﮑﻮس داﺷﺘﻪ و ﻣﻘﺪار ﺗﻮده وﯾﮋه ﺧﺎک در ﺣﺪ ﻗﺎﺑﻞ ﻗﺒﻮل و اﺳﯿﺪﯾﺘﻪ ﮔﺮوت ﺑﯿﺶ از 11 ﺧﻮاﻫﺪ رﺳﯿﺪ ﮐﻪ ﺑﺮای ﻋﻤﻠﯿﺎت ﺗﺰرﯾﻖ ﺑﺴﯿﺎر ﻣﻨﺎﺳﺐ ﻣﯽ ﺑﺎﺷﺪ. ﻫﻤﭽﻨﯿﻦ اﺛﺮ درﺻﺪﻫﺎی ﻣﺨﺘﻠﻔﯽ از ﺳﯿﻠﯿﮑﺎت ﺳﺪﯾﻢ ﺑﺮ ﺧﻮاص ﮔﯿﺮش، ﺗﻮده وﯾﮋه و اﺳﯿﺪﯾﺘﻪ ﮔﺮوت ﺑﺮرﺳﯽ ﺷﺪه و ﭘﯿﺸﻨﻬﺎداﺗﯽ ﺑﺮای ﻣﻬﻨﺪﺳﯿﻦ ﺳﺎﺧﺘﻤﺎن و ژﺗﻮﺗﮑﻨﯿﮏ اراﺋﻪ ﺷﺪه اﺳﺖ.

Investigation of Sodium Silicate, Kaolinite, Cement and Water Effects’ on Rheological and Physical Properties on Cement Based Grouts in Geotechnical and Geological Engineering

Due to the growing population growth in cities, the use of injection technology in the ground improvements, construction industry, geotechnical and geological engineering is increasing day by day. In this regard, the grout and its additive play a very important role in terms of injection conditions. In this research, viscosity and rheological measurements of grout using the viscosimeter of the model (DVII + Pro) as well as the physical criteria of the grout, including shrinkage, specific gravity (Gs), acidity (pH) on the cement base grout with the chemical additive like sodium silicate, kaolinite as mineral additive, cement and water were investigated. In this research, various grout compounds containing various percentages of sodium silicate, kaolinite and water were prepared. The results show that cement, kaolinite and sodium silicate have a reverse effect on the viscosity of the grout. If the amount of soil specific soil is acceptable and the soil acidity is more than 11, which is very suitable for injection operations. Also, the effect of various sodium silicate percentages on the binding properties, specific mass and gravity of acidity were investigated, and the results are recommended for geological and geotechnical engineers especially people who are working ans studying in this field.