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

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

ﺑﺎ ﭘﯿﺸﺮﻓﺖ ﺗﮑﻨﻮﻟﻮژي ﺗﺰرﯾﻖ در ﺻﻨﻌﺖ ﺑﻬﺴﺎزي زﻣﯿﻦ ﻫﺎ، ﮔﺮوت ﻫﺎ و اﻓﺰودﻧﯽ ﻫﺎي ﺧﺎص ﻧﻘﺶ ﻣﻬﻤﯽ را اﯾﻔﺎ ﻣﯽ ﻧﻤﺎﯾﻨﺪ. در اﯾﻦ ﭘﮋوﻫﺶ ﻣﻌﯿﺎرﻫﺎي وﯾﺴﮑﻮزﯾﺘﯽ و رﺋﻮﻟﻮژي ﮔﺮوت ﺑﺎ اﺳﺘﻔﺎده از دﺳﺘﮕﺎه وﯾﺴﮑﻮزﯾﻤﺘﺮ ﻣﺪل )DV II+Pro( و ﻫﻤﭽﻨﯿﻦ ﻣﻌﯿﺎرﻫﺎي ﻓﯿﺰﯾﮑﯽ ﮔﺮوﺗﻬﺎ از ﺟﻤﻠﻪ ﺟﻤﻊ ﺷﺪﮔﯽ )اﻧﻘﺒﺎض(، ﺗﻮده وﯾﮋه، ﻣﻘﺪار اﺳﯿﺪﯾﺘﻪ ﺑﺮ روي ﮔﺮوت ﭘﺎﯾﻪ ﺳﯿﻤﺎن ﺑﻬﻤﺮاه ﺳﯿﻠﯿﮑﺎت ﺳﺪﯾﻢ ﺑﻌﻨﻮان ﻣﺎده اﻓﺰودﻧﯽ ﺷﯿﻤﯿﺎﺋﯽ، ﮐﺎﺋﻮﻟﯿﻨﯿﺖ، ﺳﯿﻤﺎن و آب ﺑﺮرﺳﯽ ﺷﺪه اﺳﺖ. ﻫﻤﭽﻨﯿﻦ، ﺗﺮﮐﯿﺒﺎت ﻣﺨﺘﻠﻒ ﮔﺮوت ﺑﺎ درﺻﺪﻫﺎي 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 ﺧﺎك در ﺣﺪ ﻗﺎﺑﻞ ﻗﺒﻮل و اﺳﯿﺪﯾﺘﻪ ﮔﺮوت ﺑﯿﺶ از 11 ﺧﻮاﻫﺪ رﺳﯿﺪ ﮐﻪ ﺑﺮاي ﻋﻤﻠﯿﺎت ﺗﺰرﯾﻖ ﺑﺴﯿﺎر ﻣﻨﺎﺳﺐ ﻣﯽ ﺑﺎﺷﺪ. ﻫﻤﭽﻨﯿﻦ اﺛﺮ درﺻﺪﻫﺎي ﻣﺨﺘﻠﻔﯽ از ﺳﯿﻠﯿﮑﺎت ﺳﺪﯾﻢ ﺑﺮ ﺧﻮاص ﮔﯿﺮش، ﺗﻮده وﯾﮋه و اﺳﯿﺪﯾﺘﻪ ﮔﺮوت ﺑﺮرﺳﯽ ﺷﺪه و ﭘﯿﺸﻨﻬﺎداﺗﯽ ﺑﺮاي ﻣﻬﻨﺪﺳﯿﻦ ﺳﺎﺧﺘﻤﺎن و ژﺗﻮﺗﮑﻨﯿﮏ اراﺋﻪ ﺷﺪه اﺳﺖ.

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 (DV-II + 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.