The environmental consequences of modern day concrete due to high amount of carbon dioxide emission require strategies to reduce such impact. Historical and archaeological buildings are state of the art innovations known for its durability and resilience. With recent, high concrete phase of development and search for sustainable method to mitigate emission of greenhouse gases, it is paramount to consider techniques utilize by ancient researchers. This paper gives a brief review about Calcium-Aluminium-Silicate-Hydrate bond (C-(A-)S-H)1 one of the key chemical ingredient responsible for roman concrete longevity. C-A-S-H binding phase is reconfigured as potassium-rich leucite in volcanic tephra dissolves overtime improving the cohesion of the concrete. Literacy study by researchers that uncovers the nano-crystalline nature of roman concrete is presented. Comments about the technique and issues are included for possible exploration by future researchers as concrete technology continues to advance.