ﻣﻄﺎﻟﻌﻪ آزﻣﺎﯾﺸﮕﺎﻫﯽ اﺛﺮ اﺿﺎﻓﻪ ﺷﺪن ﺿﺎﯾﻌﺎت ﮐﺎرﺧﺎﻧﻪ ﺳﻨﮓ ﺑﺮ ﻣﻘﺎوﻣﺖ ﺧﺎك ﺗﺜﺒﯿﺖ ﺷﺪه ﺑﺎ آﻫﮏ و ﺳﯿﻤﺎن در ﺑﺮاﺑﺮ ﭼﺮﺧﻪ ﻫﺎي ذوب و ﯾﺨﺒﻨﺪان

Laboratory study on the effects of stone factory waste on the resistance of cement or lime stabilized soil against freeze-thaw cycles

ﺑﺎ وﺟﻮد ﺗﻼشﻫﺎي ﺑﺴﯿﺎري ﮐﻪ ﻃﯽ ﭼﻨﺪ دﻫﻪ اﺧﯿﺮ ﺑﺮاي ﮐﺎﻫﺶ ﺗﻮﻟﯿﺪ ﭘﺴﻤﺎﻧﺪﻫﺎي ﺻﻨﻌﺘﯽ و ﺑﻬﺒﻮد ﺑﻬﺮهوري از ﺳﻮي ﺑﺨﺶ ﺻﻨﻌﺖ و ﺳﺎزﻣﺎنﻫﺎي زﯾﺴﺖ ﻣﺤﯿﻄﯽ اﻧﺠﺎم ﮔﺮﻓﺘﻪ اﺳﺖ، ﮐﺎﻫﺶ ﭘﺴﻤﺎﻧﺪﻫﺎي ﺻﻨﻌﺘﯽ ﮐﻤﺎﮐﺎن ﭘﯿﭽﯿﺪه و ﭘﺮﻫﺰﯾﻨﻪ ﻫﺴﺘﻨﺪ. ﯾﮑﯽ از روﺷﻬﺎي ﻣﻨﺎﺳﺐ ﺑﺎ ﻫﺪف ﮐﺎﻫﺶ ﻫﺰﯾﻨﻪ و ﺟﺎﯾﮕﺰﯾﻨﯽ اﯾﻦ ﻧﻮع از ﭘﺴﻤﺎﻧﺪﻫﺎ، ﻣﺼﺮف اﻧﻮاع ﻣﺨﺘﻠﻒ آن ﺑﻪ ﻋﻨﻮان اﻓﺰودﻧﯽ در ﺻﻨﻌﺖ ﺳﺎﺧﺖ و ﺳﺎز در ﭘﺮوژهﻫﺎي ﻋﻤﺮاﻧﯽ اﺳﺖ. در اﯾﻦ ﻣﻘﺎﻟﻪ ﻣﻘﺎدﯾﺮ وزن ﻣﺨﺼﻮص ﺧﺸﮏ ﻣﺎﮐﺰﯾﻤﻢ، رﻃﻮﺑﺖ ﺑﻬﯿﻨﻪ و ﻣﻘﺎوﻣﺖ ﺑﺮﺷﯽ ﻧﻤﻮﻧﻪﻫﺎي ﺗﺜﺒﯿﺖ ﺷﺪه ﺧﺎك ﻣﺎﺳﻪ ﻻيدار ﺑﻬﺴﺎزي ﺷﺪه ﺑﺎ ﺿﺎﯾﻌﺎت ﺧﺮده ﺳﻨﮓ ﺣﺎﺻﻞ از ﻓﻌﺎﻟﯿﺖ ﺻﻨﺎﯾﻊ ﺳﻨﮕﺒﺮي، ﻣﻮرد ﺑﺮرﺳﯽ ﻗﺮار ﮔﺮﻓﺘﻪ اﺳﺖ. اﺛﺮ ﻣﻘﺪار ﺧﺮده ﺳﻨﮓ، ﺳﯿﻤﺎن، آﻫﮏ، زﻣﺎن ﻋﻤﻞ آوري و ﺗﻌﺪاد ﺳﯿﮑﻞﻫﺎي ذوب و ﯾﺨﺒﻨﺪان ﺑﻌﻨﻮان ﻣﺘﻐﯿﺮﻫﺎي اﺻﻠﯽ ﻣﻮرد ﺑﺮرﺳﯽ ﻗﺮار ﮔﺮﻓﺘﻪ اﺳﺖ. ﻧﺘﺎﯾﺞ آزﻣﺎﯾﺶﻫﺎي ﭘﺮاﮐﺘﻮر اﺻﻼح ﺷﺪه ﻧﺸﺎن ﻣﯽدﻫﺪ ﮐﻪ وزن ﻣﺨﺼﻮص ﺧﺸﮏ ﻣﺎﮐﺰﯾﻤﻢ ﺑﺎ اﻓﺰاﯾﺶ ﺧﺮده ﺳﻨﮓ، ﺳﯿﻤﺎن ﯾﺎ آﻫﮏ روﻧﺪ اﻓﺰاﯾﺸﯽ دارد و ﻫﻤﭽﻨﯿﻦ رﻃﻮﺑﺖ ﺑﻬﯿﻨﻪ ﺑﺎ اﻓﺰاﯾﺶ ﺧﺮده ﺳﻨﮓ ﮐﺎﻫﺶ ﭼﺸﻢ ﮔﯿﺮي ﭘﯿﺪا ﻣﯽﮐﻨﺪ. ﻧﺘﺎﯾﺞ آزﻣﺎﯾﺶ CBR ﻧﺸﺎن ﻣﯽدﻫﺪ ﮐﻪ در ﺗﻤﺎﻣﯽ ﻧﻤﻮﻧﻪﻫﺎ، اﻓﺰاﯾﺶ ﻣﺪت زﻣﺎن ﻋﻤﻞآوري ﺑﺎﻋﺚ اﻓﺰاﯾﺶ ﭼﺸﻢﮔﯿﺮي در ﻣﻘﺎدﯾﺮ CBR ﺷﺪه اﺳﺖ. اﻓﺰاﯾﺶ ﻣﻘﺪار ﺧﺮده ﺳﻨﮓ در ﻧﻤﻮﻧﻪﻫﺎي ﺗﺜﺒﯿﺖ ﺷﺪه ﺑﺎ آﻫﮏ و ﺳﯿﻤﺎن ﺑﺎﻋﺚ اﻓﺰاﯾﺶ CBR ﺷﺪه اﺳﺖ. اﻓﺰاﯾﺶ ﻣﻘﺎدﯾﺮ ﺳﯿﻤﺎن ﯾﺎ آﻫﮏ در ﻧﻤﻮﻧﻪﻫﺎي ﺗﺜﺒﯿﺖ ﺷﺪه ﺑﺎ ﻣﻘﺎدﯾﺮ ﯾﮑﺴﺎﻧﯽ از ﺧﺮده ﺳﻨﮓ در ﯾﮏ ﻣﺪت زﻣﺎن ﻋﻤﻞ آوري ﺧﺎص، ﺑﺎﻋﺚ اﻓﺰاﯾﺶ ﻣﻘﺎوﻣﺖ ﺷﺪه اﺳﺖ. ﻣﻘﺎﯾﺴﻪ ﻧﺘﺎﯾﺞ ﺑﯿﻦ ﻧﻤﻮﻧﻪﻫﺎي ﺗﺜﺒﯿﺖ ﺷﺪه ﺑﺎ ﺳﯿﻤﺎن و آﻫﮏ ﻧﺸﺎن ﻣﯽدﻫﺪ ﮐﻪ ﻧﻤﻮﻧﻪﻫﺎي ﺗﺜﺒﯿﺖ ﺷﺪه ﺑﺎ ﺳﯿﻤﺎن ﻣﻘﺎوﻣﺖ ﺑﯿﺸﺘﺮي ﻧﺴﺒﺖ ﺑﻪ ﻧﻤﻮﻧﻪﻫﺎي ﺗﺜﺒﯿﺖ ﺷﺪه ﺑﺎ آﻫﮏ در ﺷﺮاﯾﻂ ﯾﮑﺴﺎن دارد. ﻧﺘﺎﯾﺞ آزﻣﺎﯾﺶﻫﺎي ذوب و ﯾﺨﺒﻨﺪان ﻧﯿﺰ ﻧﺸﺎن ﻣﯽدﻫﺪ ﮐﻪ اﻓﺰاﯾﺶ ﺗﻌﺪاد ﺳﯿﮑﻞﻫﺎي ذوب و ﯾﺨﺒﻨﺪان ﻣﻮﺟﺐ ﮐﺎﻫﺶ CBR ﻧﻤﻮﻧﻪﻫﺎي ﺗﺜﺒﯿﺖ ﺷﺪه ﺑﺎ آﻫﮏ و ﺳﯿﻤﺎن ﻣﯽﺷﻮد. اﺛﺮ ﺗﻌﺪاد ﺳﯿﮑﻞﻫﺎي ذوب و ﯾﺨﺒﻨﺪان ﺑﺮ ﮐﺎﻫﺶ ﻣﻘﺎوﻣﺖ ﻧﻤﻮﻧﻪﻫﺎ ﺑﺎ اﻓﺰاﯾﺶ ﻣﻘﺪار ﺧﺮده ﺳﻨﮓ، ﭼﺸﻤﮕﯿﺮﺗﺮ اﺳﺖ.

In this paper, the maximum dry density, Optimum moisture content and CBR value of stabilized soil specimens mixed with crushed stone obtained from rock factory waste have been investigated. The effects of the crushed stone waste, cement or lime contents, curing time and number of freeze-thaw cycles have been investigated. The results of standard Proctor compaction tests show that the maximum dry density has an increasing trend due to the increase in crushed stone, cement or lime content, and also the optimum moisture decreased significantly with the increase of the crushed stone content. The results of the CBR test show that the increase in processing time caused a significant increase in CBR values. Increasing the crushed stone waste in lime or cement-stabilized specimens results in an increase of CBR value. Increasing the cement or lime content increases the strength of the specimens for a given crushed stone content and curing time. Comparing the results between cement and lime-stabilized specimens shows that cement-stabilized specimens have more resistant than lime-stabilized specimens under the same condition. The results of freezing-thawing tests show that increasing the number of freeze-thaw cycles decreases the CBR value of lime or cement-stabilized specimens. The effect of the number of freeze-thaw cycles on reducing the resistance of the specimens is more significant with increasing the crushed stone content.