Even when performing work on the laying of foundations, and then, on the device of drainage, fears arose relatively harmful effects on the solution in the laying of chemical impurities contained in the groundwater. The water had a green color, the instruments quickly rusted the well in the absorption of the well, were completely impudent for a month and scattered into powder. In view of this, a chemical analysis of water was carried out, which determined the presence in the drink of cramped salts with a predominance of copper sulfate and aluminum sulfate. Samples from cement mortar were made on this water and exposed to ordinary water; No changes were found in the samples or in water, as a result of which it came to the conclusion that polluted waters would not have harmful effects on masonry. Observations of the action of groundwater on the solution continued during the construction of the foundations, but they did not give anything new. A month after the drainage device, some lightening was set up from it, which indicated a decrease in its acidity, however, observation of the state of foundations was resumed.
What errors are made when laying the foundation
