تولید سیمان (هیدرولیکی)_

رویدادها

1. 01۱۹۷۴Great Civilization spending surge -- Fifth Plan revisedقوت ارتباط

   Following the 1973-74 oil price quadrupling, government oil revenue rises from $5bn to $19bn in a year; the Shah revises the Fifth Development Plan, nearly doubling total planned investment from $36.5bn to $70bn and raising overall government spending from $44bn to $123bn, fueling severe absorptive-capacity bottlenecks and inflation.

   چرایی این پیوند: Cement (hydraulic) production rose from 3,489 thousand tonnes (1973) to 5,000 (1974, +43.3%) to 12,000 by 1978 (+244% cumulative from 1973) -- one of the most direct physical-volume confirmations of the oil-boom construction and infrastructure spending surge that followed the 1973-74 price shock and the Fifth Plan's upward revision.

   ملاحظه: None substantial -- cement is a near-ideal physical proxy for construction-sector activity, and the timing match with the documented Fifth Plan revision is clean.

   تأخیر اثر: immediate, 1973-1978منبع: Intereconomics (Naini) -- The Fifth Development Plan
2. 02۱۹۷۹Islamic Revolutionقوت ارتباط

   Mohammad Reza Shah's government falls; the Islamic Republic is proclaimed under Ayatollah Khomeini on 1 April 1979.

   چرایی این پیوند: Production fell from its 12,000-thousand-tonne 1978 peak to 9,000 in both 1979 and 1980 (-25%), consistent with the broader construction-sector slowdown documented across this database's other industry and labor charts for these years, though the decline here is milder than in some other sectors (e.g. automotive, which fell over 70% by 1990).

   ملاحظه: A 25% pullback from a record peak, then holding flat rather than continuing to collapse through 1980, is a comparatively modest reaction -- cement demand from basic reconstruction/housing needs may have proven more resilient through the revolution's first two years than more discretionary industrial activity; this project's data ends in 1980, so the deeper Iran-Iraq War-era trajectory (1981 onward) cannot be assessed from this chart.

   تأخیر اثر: immediate, 1978-1980منبع: Encyclopaedia Britannica