Aiming at the problems of weak acidity medium weathered igneous rock around Nairobi, Kenya, poor adhesion with asphalt and water stability binder, article studied use anti-stripping agent, cement, hydrated Lime other technical measures to improve binder rock. The results showed that 48h Marshall residual benchmark without any was 78.5%, which did not meet standard requirements. can be significa...

[1] The cryptoendolithic habitat of the Antarctic Dry Valleys has been considered a good analogy for past Martian ecosystems, if life arose on the planet. Yet cryptoendoliths are thought to favor the colonization of rocks that have a preexisting porous structure, e.g., sandstones. This may weaken their significance as exact analogues of potential rockcolonizing organisms on Mars, given our curr...

We report the isolation and physiological characterization of novel, psychrophilic, iron-oxidizing bacteria (FeOB) from low-temperature weathering habitats in the vicinity of the Juan de Fuca deep-sea hydrothermal area. The FeOB were cultured from the surfaces of weathered rock and metalliferous sediments. They are capable of growth on a variety of natural and synthetic solid rock and mineral s...