If the cost of refurbishment is part of improvements / additions to the property, you can claim the benefit of indexation even for the amount of Rs. 24 L. However, if the amount is towards maintenance of the property, in the nature of upkeep of the property as mentioned by you, you will not be able to claim this as part of the cost of acquisition of your property.
Assuming that the cost of upkeep of the property cannot be claimed as the cost of acquisition of the property, the indexed cost of acquisition of the property as mentioned by you is Rs. 1.44 Cr. The Long Term capital gains will be Rs 56 L.
You can avail exemption u/s 54/ 54F,54EC,54ED and 54EE, subject to fulfilment of conditions specified therein.
If you are not able to such exemption, your tax liability will be 20.6% (including cess) of your LTCG, i.e., 11,2 L. If you are not a senior citizen,without business income, you need to pay advance tax also.