METHOD FOR ESTIMATING INDOOR AIR ENVIRONMENT RESULTING FROM AMMONIA GAS PRODUCED FROM STRUCTURE CONCRETE

摘要

PROBLEM TO BE SOLVED: To provide a method by which the indoor air environment resulting from an ammonia gas produced from structure concrete can be estimated accurately by eliminating the inconvenience of interrupting construction work or inaccurate measurement. SOLUTION: In this method, a measurement vessel 4 for forming closed space is put on the surface of the structure concrete 3 and an ammonia gas collecting device collects ammonia gas-containing air by sucking the air from the vessel 4 at a fixed flow rate by maintaining the inside of the vessel 4 at a positive pressure by supplying an ammonia-free gas to the vessel 4 and recognizes the produced amount of the ammonia gas from the structure concrete 3 per unit area by measuring the amount. Thereafter, the concentration variation of the ammonia gas is estimated by intermittently executing the work for measuring the produced amount of the ammonia gas on the surface of the concrete 3.