![]() ![]() The draft is likely to change, but it doesn’t yet include full agreements on the three major goals that the U.N. set going into the negotiations: for rich nations to give poorer ones $100 billion a year in climate aid, to ensure that half of that money goes to adapting to worsening global warming, and the pledge to slash global carbon emissions by 2030. It acknowledges “with regret” that rich nations have failed to live up to the climate finance pledge. Currently they are providing around $80 billion a year, which poorer nations that need financial help both in developing green energy systems and adapting to the worst of climate change say isn’t enough. The transport of products from inner aggregate regions into the cement paste along propagating cracks was followed in 4D.Papua New Guinea Environment Minister Wera Mori said that given the lack of financial aid his country may “rethink” efforts to cut logging, coal mining and even coming to the U.N. ![]() This new methodology allowed showing that similar amounts of ASR products were found inside the aggregates and inside the cement paste. After optimizing the contents of both agents synergistically for mortars, we realize for the first time a quantitative characterization of the spatial-temporal distributions of both ASR products and cracks, while differentiating their presence in aggregates and in cement paste. To address this limitation, we propose the implementation of two complementary contrast agents, BaSO 4 and CsNO 3. ![]() Time-lapse X-ray tomography could be key to advancements but has not been extensively exploited, mainly due to similar electron densities of the different material phases, which leads to poor contrast in the tomograms. Methodological challenges have long been an obstacle for the understanding of damage in concrete due to the alkali-silica reaction (ASR). ![]()
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