(Source: Holcim Ltd) Holcim media release on half-year results 2015 Volume increases in aggregates and ready-mix concrete Economic uncertainty across several markets impacts Group's performance Higher cash flow and net income as a result of portfolio optimization LafargeHolcim launched following successful merger completion in July In the first half of 2015, Holcim generated higher cash flow from operating activities and increased net income supported by the gain from the divestment of the Group's minority shareholding in Siam City Cement in March. However, the Group was faced with an overall challenging development in the first half of 2015 as lower than anticipated demand in some markets...