Colors of Concrete: Many Shades of Gray

A concrete surface with uneven color. The overall color is medium gray, but different batches of poured sections have slight color variations: some are warmer and yellowish, others are cooler and bluish. The color is darker near the formwork joints and lighter in large central areas. The surface also has cloud-like variations in shade caused by water marks and localized efflorescence. These inconsistencies are natural results of the material. Avoid: making the concrete a uniform gray, using paint to unify the color, having no color differences or water marks on the surface, adjusting the concrete to a warm color to mask cool tones.

Translated from Chinese by AI.

一片顏色不均的混凝土表面。整體是中灰色,但不同批次澆置的區塊顏色略有差異:有些偏暖偏黃、有些偏冷偏藍;靠近模板接縫處顏色較深,大面積的中央較淺。表面還有水痕造成的雲狀深淺與局部的白華。這些不均是材料的自然結果。避免:把混凝土做成均勻一致的灰色、使用塗料統一顏色、讓表面沒有任何色差與水痕、把混凝土調成暖色掩蓋冷調。